Add support for pulling your own user’s collection, similar to how the user’s watchlist is currently pulled.

https://trakt.tv/users/USERNAME/collection

https://trakt.docs.apiary.io/#reference/users/collection

I write this after realizing that the existing trakt_collected is not in fact the user collection, and setting the limit to 1000 in order to leave room for my Trakt collection to grow would in fact pull the top 1000 collected shows across all of Trakt. Luckily I had a backup because Sonarr does not have a mass delete feature 😂