Defining props for code components

Make sure the data matches the shape of how #3499927: Config entity for storing code components expects it. (Saving is out of the scope of this issue.)

… but per that issue, it'll be exactly like SDC props. So that means … that this can get started ahead of that issue being done? :)

This issue summary does not explicitly state which JSON schema types should be available to pick from while defining props for code components.

Are you aware that type: array and type: object are both impossible to support at this time? Which means that this issue would be restricted to "primitive/scalar" JSON schema types.

Citing the relevant bit of config schema that landed in #3499927: Config entity for storing code components:

          type:
            type: string
            label: 'Type'
            constraints:
              Choice:
                # Not all JSON Schema basic types make sense (for example: `null`).
                # @see https://json-schema.org/understanding-json-schema/reference/type
                - 'string'
                - 'number'
                - 'integer'
                - 'boolean'
                # @todo Consider adding `array` after https://www.drupal.org/i/3467870 is fixed.
                # @todo Consider adding `object`, but defining _arbitrary_ object shapes is not yet supported.
                # @see \Drupal\experience_builder\JsonSchemaInterpreter\SdcPropJsonSchemaType::computeStorablePropShape()

Looks AMAZING! 🤩👏

Looking forward to being able to save it in #3506424: Loading and auto-saving an edited code component 😄

Signaling this still needs a screencast/GIF.