Add adapted resource schema files

[Gijsreyn]

PR Summary

This pull request adds the adapted resource schema files. I can remember from #1083 that it wasn't required to generate the .json files.

PR Context

Partially fixes #1460.

[Copilot]

Pull request overview

Adds schema sources for adapted resource manifests to the repository’s schema set, and wires the new manifest schema into the schema bundling configuration (to support publishing bundled/enhanced variants alongside existing resource/extension schemas).

Changes:

• Added schemas/src/adaptedresource/manifest.yaml describing the adapted resource manifest shape and authoring helpers.
• Added schemas/src/adaptedresource/manifest.schema.yaml defining the embedded instance schema shape for adapted resources.
• Updated schemas/schemas.config.yaml to generate bundled (Json + JsonVSCode) outputs for the adapted resource manifest schema.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
schemas/src/adaptedresource/manifest.yaml	New adapted resource manifest schema (incl. docs/snippets and $schema URI set).
schemas/src/adaptedresource/manifest.schema.yaml	New schema describing the embedded instance-schema object used by adapted resources.
schemas/schemas.config.yaml	Adds bundling config entry for adapted resource manifest schema outputs.

[Copilot]

This adds a bundle for adaptedresource/manifest.json, but schemas/build.ps1’s schema registry is built only from config/metadata/definitions/extension/outputs/resource directories. Without adding the adaptedresource directory there, bundling won’t inline refs to /.../adaptedresource/* and the post-processing step that strips VS Code-only keywords also won’t run on the adaptedresource schemas.

Suggested change

	# Adapted resource manifest bundle
	- ConfigFilePath: adaptedresource/manifest.json
	Name: manifest
	OutputDirectory: bundled/adaptedresource
	OutputFormat: ['Json', 'JsonVSCode']

[Gijsreyn]

@michaeltlombardi - do you know by heart if this is a valid comment?