Add support for Plex Podcasts

Implement support for the newly released Podcasts feature in Plex

Possible app features:

  • Get followed podcasts
  • Able to manage (add/edit/remove) followed podcasts
  • Able to listen to podcasts locally
  • Able to cast podcasts
  • Able to mark podcasts as played/unplayed
  • Able to sync podcasts locally
  • Auto remove synced podcasts when played

Loving the Yatse app, keep up the AMAZING work! :smiley: