Added option to sync Trakt watchlist into local library of Nuvio

[Judzim]

Add Trakt library sync configuration

Added three sync modes in Trakt settings:

• Off - No Trakt sync, library stays offline
• Manual - Sync on-demand via button in library (bottom-right corner)
• Automatic - Auto-sync when library opens for the first time after app launch

Gives users control over when and how their library syncs with Trakt.

[Judzim]

Just a small positive disclaimer, I’ve been using the built APK for about a week now, and I’m happy to report that I haven’t found any bugs during real-life usage. I wasn’t able to test it on iOS, though.

If you get a chance to review or test it sometime and consider merging later, that would be amazing, @tapframe

P.S.
I noticed a similar feature in NuvioTV. I haven’t looked into its logic yet, but if it turns out to be a better implementation of the same idea, it might make sense to go with that instead. The overall goal seems quite similar.