Add GET /api​/v1​/users​/me​/videos​/likes endpoint to retrieve a user's liked videos

[ritteraf]

Describe the problem to be solved

There is currently no way for an authenticated user to retrieve a list of videos they have liked. The rate system (PUT /api​/v1​/videos/{id}/rate) records likes against videos, but there is no corresponding read endpoint to surface that data back to the user as a collection. Third-party clients (and PeerTube's own web UI) have no way to implement a "Liked Videos" library feature because the data is write-only from the API's perspective.

Describe the solution you would like

Add a dedicated endpoint GET /api​/v1​/users​/me​/videos​/likes, following the exact same pattern as the existing watch history endpoint GET /api​/v1​/users​/me​/videos​/history. It should:

• Require authentication
• Return a standard paginated Video​List response (same Video object shape used across all video list endpoints)
• Support start and count pagination parameters
• Support a search query parameter to filter results by video title (same as GET /api​/v1​/users​/me​/videos​/history)
• Sort by liked​At descending by default (most recently liked first)
• Be automatically maintained by the server — populated when a user submits rating: "like" and depopulated when the rating is removed or changed. No manual client management.

This is a read-only mirror of a signal the server already records. The write path already exists. This request is purely for the missing read path.