Schemas: Allow custom blocks in theme.json styles

[walbo]

Description

This PR fixes the JSON Schema to add support for custom blocks in the styles blocks section of theme.json files. Support for custom blocks in the settings section was added in #36341

How has this been tested?

{
	"$schema": "../theme.json",
	"version": 1,
	"styles": {
		"blocks": {
			"core/archives": {
				"border": {
					"color": "#000"
				}
			},
			"example/namespace": {
				"border": {
					"color": "#000"
				}
			}
		}
	}
}

Types of changes

Update JSON Schema to allow custom blocks

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[ryanwelcher]

LGTM! 👍

[ajlende]

Is allOf required here, or can patternProperties just be used alongside properties?

[walbo]

Yes. That should work. I followed how it was done in settings.blocks.

I'll update the PR and change it in settings.blocks as well (for consistency).

[walbo]

@ajlende Updated.

Testet locally that:

• autosuggest for core blocks still works
• custom blocks are allowed
• custom properties with invalid name shows warning

[ajlende]

Thanks for cleaning up that other spot too! Tested locally in VSCode and IntelliJ; LGTM 👍

[Mamaduka]

Backported to 5.9.1.