Copy from [OpenAPI-Specification](https://github.com/OAI/OpenAPI-Specification/blob/main/.github/workflows/schema-tests.yaml) - [x] add workflow to test schema(s) - [x] add tests - [x] publish schemas on https://spec.openapis.org/ - https://github.com/OAI/OpenAPI-Specification/pull/4239
