[WIP] Respect @nestjs/swagger ApiExcludeController/ApiExcludeEndpoint

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

Feature Request

Currently controllers/endpoints with the following decorators appear in the swagger.json

@ApiExcludeEndpoint()
@ApiExcludeController()

https://docs.nestjs.com/openapi/decorators

Fixes #1178.

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