FieldItemTypeParagraphsBlokkliMutation not found

Problem/Motivation

When setting up the GraphQL server I am getting the following error when I enable the Paragraphs Blokkli Edit extension:

> GraphQL\Error\Error: Type "FieldItemTypeParagraphsBlokkliMutation" not found in document

Proposed resolution

1. The extension has an undeclared dependency on the paragraphs_blokkli_edit_state entity type.
2. It also has a dependency on the mutations field of the paragraphs_blokkli_edit_state entity type. This is not enforceable right now, since the GraphQL Core Schema module does not have a way to declare field dependencies. But we can document how to set this up.