Feature request: Allow syncing of Liked Lists without needing Watchlist sync

[NGDM]

Feature description

For the moment the Liked List sync feature (trakt_to_plax["liked_lists"]) is broken because it only runs if you enable the trakt_to_plex["watchlist"] and trakt_to_plex["watchlist_as_playlist"] configs.
See here for more elaborate explanation.

Syncing Liked Lists should be possible even if the watchlist and watchlist_as_playlist configs are false.

Use case

I don't want to sync my Trakt Watchlist as a separate Plex Playlist, but as the Plex Watchlist, yet also want to sync my Trakt Liked Lists as Plex Playlists.
For the moment this is not possible.

Workarounds

Leave trakt_to_plex["watchlist"] and trakt_to_plex["watchlist_as_playlist"] on true

Plan to implement

N/A

[glensc]

Can you propose new config keys to support all variations? or just different variations of config and I can see how to tweak the code?

My first thought would have been to just separate watchlist and watchlist_as_playlist, but here seems more variations are possible. and for compatibility turn watchlist_as_playlist off by default.