Only returns up to 50 media items

[sup3rmark]

The recentlyAdded API endpoint only returns up to 50 items. Not sure offhand if this is a pagination thing or if recentlyAdded has a hard cap of 50 items.

Investigate whether pagination is an option here and implement a solution that uses that. If it's not an option, pull all items from Plex and then filter down to items added in the past x days that way.