[Bug] Anilist smaller bugs

[willtho89]

There are still some bugs in the anilist migration (after #13 ). This issues is there to keep progress. As I'm not an avid Anime watcher, these are low on priority

• Ratings are not pushed to Anilist after beeing set in librarySync
• Ratings import is not fully tests
• Deletion Events do not clear the activitiy feed in anilist
• Sync full(/pagineted) history to anilist is not yet supported
  • Need to refresh existing libarySync watch history with anime IDs
• Anilist does not support single episode watches, it only keeps track of the highest watched episode. This logic must be reflected on import/sync/delete

Some Notes:

• Anilist does not support episode rating, only whole shows