Companion app

[kingbri1]

Since AirPlay doesn't work with MKV files, create a companion server that can pick up URL payloads and run them on the respective OS. The OS has to support deeplinking to open and play things in other apps.

References #17 for creating decentralized actions for importing into the companion.

[kingbri1]

This most likely won't be created due to time constraints, but if someone else creates an external player protocol app like Kodi, it should be possible to add support to Ferrite.