feat(favorites): implement favorites API endpoints and UI integration

[StancuFlorin]

• Added new API endpoints for managing user favorites, including fetching, adding, and removing favorites for movies and TV shows.
• Updated the User entity to include a relationship with UserFavorite.
• Integrated favorites functionality into MovieDetails and TvDetails components, allowing users to add or remove titles from their favorites.
• Enhanced the Sidebar to include a link to the favorites page.
• Updated the OpenAPI documentation to reflect the new favorites endpoints.

Description

Screenshot (if UI-related)

To-Dos

• [ ] Successful build yarn build
• [ ] Translation keys yarn i18n:extract
• [x] Database migration (if required)

Issues Fixed or Closed

https://github.com/sct/overseerr/issues/4289

[SerenModz21]

Just to let you know, Overseerr and Jellyseerr are currently in the process of merging into Seerr. As such, all development is now happening here: https://github.com/seerr-team/seerr (previously the Jellyseerr repo)

The announcement can be found on the Seerr (previously Overseerr) Discord server: https://discord.com/channels/783137440809746482/785475251231784961/1424781317471473837

Invite link: https://discord.gg/seerr