Add shared base types for Repositories, Publications, Remotes and Distributions

[Redtigercod4]

Summary

Added shared base types in new src/api/common.ts, mapped against Pulp's core
serializer types (repository, remote, distribution, publication). Types only —
no behavioural or structural changes to existing API calls.

Changes

1. Added src/api/common.ts with GenericResource, GenericRepository,
   GenericRemote, GenericDistribution, GenericPublication and shared
   plugin types.
2. Updated interfaces in related Ansible plugins to extend the new Generic
   types, correcting several field type mismatches.
3. Added types to RPM plugins, previously untyped.
4. Added types to File plugins, previously untyped.
5. Added Container Distribution types, previously untyped.

Related

1. Issue - Base / Common class properties/types #255
2. Pull Request - Rough draft rpm repository management #254

Sources

1. https://github.com/pulp/pulp_container/tree/main
2. https://github.com/pulp/pulp_ansible/tree/main
3. https://github.com/pulp/pulpcore/tree/main
4. https://github.com/pulp/pulp_rpm

[Redtigercod4]

@himdel Good advice on the previous PR, this one is smaller and more focused on base types against Pulp Core. I have now built out a fully typed & tested RPM Repository Client on the API layer but is now blocked by this one.

Would it be possible to get a review on this one so that I can fully raise the other?

Blocked PR - #308