Added typed RPM Repository API Client

[Redtigercod4]

Summary

Built out a fully-typed API client for RPM repositories, deprecating the older RPMRepositoryAPI. Covers standard CRUD endpoints from RpmRepositoryViewSet and models against Pulp Core behaviours. This is backed by a suite of integration tests that runs against a live Pulp instance.

Changes

1. Added typed RPM Repository API client (list, retrieve, create, update, delete) built off RpmRepositorySerializer.
2. Added DispatchedTaskResponse to common.ts for pulpcore's async task response, used by update (200/202) and delete (always 202).
3. Added integration tests against a live Pulp instance using node:test.
4. Added standalone test client and task-completion poll helper.
5. Deprecated the old RPMRepositoryAPI in favor of the new client.

Out of Scope

1. Migrating existing consumers off the deprecated RPMRepositoryAPI.
2. sync, modify/revert, and listVersions endpoints.
3. UI/component consumption of this client.

Blockers

1. Add shared base types for Repositories, Publications, Remotes and Distributions #307

Sources

1. https://github.com/pulp/pulpcore/tree/main
2. https://github.com/pulp/pulp_rpm