fix: add argument_specs to meta schema (#4762)

[Jkhall81]

Summary
This PR adds support for argument_specs within meta/main.yml, allowing role argument validation to be defined directly in the main metadata file. It links the metadata schema to the existing entry_point definition to ensure consistent validation of argument types and descriptions.

Fixes #4762

[Jkhall81]

I fixed a MissingRefError in the CI by updaing schema.spec.ts to a two-pass loader. This ensures all local schemas are registered in the Ajv cache before compilation, resolving the race condition between meta.json and role-arg-spec.json. I also added a type cast and linter ignore to handle custom schema properties (examples, x-ansible-lint) that sit outside the standard TypeScript AnySchema definition.