[All Clients] Harmony API Support

It would be great if the Plex Clients integrated with Harmony API (https://www.myharmony.com/en-us/harmony-api). For example pressing play on a movie triggers my “movie” action on Harmony One Hub. (Lights adjust to those settings).

Not sure if this is separate, but allowing the Plex Players to utilize Harmony One inputs officially would make my day.

Early 2021 clean-up: duplicate