Ensure valid "type" values for JSON data types

Consider:

{
    "$schema": "http://json-schema.org/draft-07/schema",
    "$id": "http://vanilla-drupal.local/en/jsonapi/node/recipe/resource/schema.json?XDEBUG_SESSION_START=PHPSTORM",
    "allOf": [
        {
            "type": "object",
            "properties": {
                "attributes": {
                    "$ref": "#/definitions/attributes"
                },
                "relationships": {
                    "$ref": "#/definitions/relationships"
                }
            }
        },
        {
            "$ref": "https://jsonapi.org/schema#/definitions/resource"
        }
    ],
    "properties": {
        "attributes": {
            "$ref": "#/definitions/attributes"
        }
    },
    "definitions": {
        "attributes": {
            "description": "Entity attributes",
            "type": "object",
            "properties": {
                "drupal_internal__nid": {
                    "type": "integer",
                    "title": "ID"
                },
                "drupal_internal__vid": {
                    "type": "integer",
                    "title": "Revision ID"
                },
                "langcode": {
                    "type": "object",
                    "properties": {
                        "value": {
                            "type": "string",
                            "title": "Language code"
                        },
                        "language": {
                            "type": "language_reference",
                            "title": "Language object",
                            "description": "The referenced language"
                        }
                    },
                    "required": [
                        "value"
                    ],
                    "title": "Language"
                },
                "revision_timestamp": {
                    "type": "number",
                    "title": "Revision create time",
                    "format": "utc-millisec",
                    "description": "The time that the current revision was created."
                },
                "revision_log": {
                    "type": "string",
                    "title": "Revision log message",
                    "description": "Briefly describe the changes you have made.",
                    "default": ""
                },
                "status": {
                    "type": "boolean",
                    "title": "Published",
                    "default": true
                },
                "title": {
                    "type": "string",
                    "title": "Recipe Name",
                    "maxLength": 255
                },
                "created": {
                    "type": "number",
                    "title": "Authored on",
                    "format": "utc-millisec",
                    "description": "The time that the node was created."
                },
                "changed": {
                    "type": "number",
                    "title": "Changed",
                    "format": "utc-millisec",
                    "description": "The time that the node was last edited."
                },
                "promote": {
                    "type": "boolean",
                    "title": "Promoted to front page",
                    "default": true
                },
                "sticky": {
                    "type": "boolean",
                    "title": "Sticky at top of lists",
                    "default": false
                },
                "default_langcode": {
                    "type": "boolean",
                    "title": "Default translation",
                    "description": "A flag indicating whether this is the default translation.",
                    "default": true
                },
                "revision_default": {
                    "type": "boolean",
                    "title": "Default revision",
                    "description": "A flag indicating whether this was a default revision when it was saved."
                },
                "revision_translation_affected": {
                    "type": "boolean",
                    "title": "Revision translation affected",
                    "description": "Indicates if the last edit of a translation belongs to current revision."
                },
                "moderation_state": {
                    "type": "string",
                    "title": "Moderation state",
                    "maxLength": 255,
                    "description": "The moderation state of this piece of content."
                },
                "path": {
                    "type": "object",
                    "properties": {
                        "alias": {
                            "type": "string",
                            "title": "Path alias"
                        },
                        "pid": {
                            "type": "integer",
                            "title": "Path id"
                        },
                        "langcode": {
                            "type": "string",
                            "title": "Language Code"
                        }
                    },
                    "title": "URL alias"
                },
                "content_translation_source": {
                    "type": "object",
                    "properties": {
                        "value": {
                            "type": "string",
                            "title": "Language code"
                        },
                        "language": {
                            "type": "language_reference",
                            "title": "Language object",
                            "description": "The referenced language"
                        }
                    },
                    "required": [
                        "value"
                    ],
                    "title": "Translation source",
                    "description": "The source language from which this translation was created.",
                    "default": "und"
                },
                "content_translation_outdated": {
                    "type": "boolean",
                    "title": "Translation outdated",
                    "description": "A boolean indicating whether this translation needs to be updated.",
                    "default": false
                },
                "field_cooking_time": {
                    "type": "integer",
                    "title": "Cooking time"
                },
                "field_difficulty": {
                    "type": "string",
                    "title": "Difficulty",
                    "enum": [
                        "easy",
                        "medium",
                        "hard"
                    ],
                    "default": "medium"
                },
                "field_ingredients": {
                    "type": "string",
                    "title": "Ingredients",
                    "maxLength": 255,
                    "description": "List the ingredients required for this recipe, one per item."
                },
                "field_number_of_servings": {
                    "type": "integer",
                    "title": "Number of servings"
                },
                "field_preparation_time": {
                    "type": "integer",
                    "title": "Preparation time"
                },
                "field_recipe_instruction": {
                    "type": "object",
                    "properties": {
                        "value": {
                            "type": "string",
                            "title": "Text"
                        },
                        "format": {
                            "type": "string",
                            "title": "Text format"
                        }
                    },
                    "required": [
                        "value"
                    ],
                    "title": "Recipe instruction"
                },
                "field_summary": {
                    "type": "object",
                    "properties": {
                        "value": {
                            "type": "string",
                            "title": "Text"
                        },
                        "format": {
                            "type": "string",
                            "title": "Text format"
                        }
                    },
                    "required": [
                        "value"
                    ],
                    "title": "Summary",
                    "description": "Provide a short overview of this recipe."
                },
                "layout_builder__layout": {
                    "type": "layout_section",
                    "title": "Layout"
                }
            },
            "required": [
                "drupal_internal__nid",
                "drupal_internal__vid",
                "title",
                "revision_translation_affected",
                "path",
                "field_difficulty",
                "field_number_of_servings",
                "field_preparation_time",
                "field_recipe_instruction",
                "field_summary"
            ],
            "additionalProperties": false
        },
        "relationships": {
            "description": "Entity relationships",
            "properties": {
                "node_type": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "object",
                            "required": [
                                "type",
                                "id"
                            ],
                            "properties": {
                                "type": {
                                    "type": "string",
                                    "title": "Referenced resource",
                                    "enum": [
                                        "node_type--node_type"
                                    ]
                                },
                                "id": {
                                    "type": "string",
                                    "title": "Resource ID",
                                    "format": "uuid",
                                    "maxLength": 128
                                }
                            }
                        }
                    },
                    "title": "Content type"
                },
                "revision_uid": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "object",
                            "required": [
                                "type",
                                "id"
                            ],
                            "properties": {
                                "type": {
                                    "type": "string",
                                    "title": "Referenced resource",
                                    "enum": [
                                        "user--user"
                                    ]
                                },
                                "id": {
                                    "type": "string",
                                    "title": "Resource ID",
                                    "format": "uuid",
                                    "maxLength": 128
                                }
                            }
                        }
                    },
                    "title": "Revision user"
                },
                "uid": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "object",
                            "required": [
                                "type",
                                "id"
                            ],
                            "properties": {
                                "type": {
                                    "type": "string",
                                    "title": "Referenced resource",
                                    "enum": [
                                        "user--user"
                                    ]
                                },
                                "id": {
                                    "type": "string",
                                    "title": "Resource ID",
                                    "format": "uuid",
                                    "maxLength": 128
                                }
                            }
                        }
                    },
                    "title": "Authored by"
                },
                "field_image": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "object",
                            "required": [
                                "type",
                                "id"
                            ],
                            "properties": {
                                "type": {
                                    "type": "string",
                                    "title": "Referenced resource",
                                    "enum": [
                                        "file--file"
                                    ]
                                },
                                "id": {
                                    "type": "string",
                                    "title": "Resource ID",
                                    "format": "uuid",
                                    "maxLength": 128
                                }
                            }
                        }
                    },
                    "title": "Image"
                },
                "field_recipe_category": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "array",
                            "items": {
                                "type": "object",
                                "required": [
                                    "type",
                                    "id"
                                ],
                                "properties": {
                                    "type": {
                                        "type": "string",
                                        "title": "Referenced resource",
                                        "enum": [
                                            "taxonomy_term--recipe_category"
                                        ]
                                    },
                                    "id": {
                                        "type": "string",
                                        "title": "Resource ID",
                                        "format": "uuid",
                                        "maxLength": 128
                                    }
                                }
                            }
                        }
                    },
                    "title": "Recipe category"
                },
                "field_tags": {
                    "type": "object",
                    "properties": {
                        "data": {
                            "type": "array",
                            "items": {
                                "type": "object",
                                "required": [
                                    "type",
                                    "id"
                                ],
                                "properties": {
                                    "type": {
                                        "type": "string",
                                        "title": "Referenced resource",
                                        "enum": [
                                            "taxonomy_term--tags"
                                        ]
                                    },
                                    "id": {
                                        "type": "string",
                                        "title": "Resource ID",
                                        "format": "uuid",
                                        "maxLength": 128
                                    }
                                }
                            }
                        }
                    },
                    "title": "Tags"
                }
            },
            "type": "object",
            "additionalProperties": false
        }
    }
}

Notice how we have "type": "layout_section" and "type": "language_reference". These are not valid JSON data types. This is likely caused by the fallback TypeMapper plugin. We need to add better handling for these specific cases and default to undefined TypeMapper for unknown cases.