Add a JSON schema model class with all known keywords

[MaggieKimani1]

Support all keywords highlighted here:

• Add support for $schema, $id, $comment, $vocabulary, $dynamicRef, $dynamicAnchor, $recursiveAnchor, $recursiveRef #1274
• https://github.com/OAI/OpenAPI-Specification/blob/main/schemas/v3.1/meta/base.schema.yaml