allow spotifyd to act as a playback data relay

[ralphptorres]

does spotifyd support a "companion mode" (idk what to call it) like the spotify desktop app -- one that broadcasts playback data to mpris even when playback occurs on another device? i'm thinking of like a spotifyd --companion flag that lets spotifyd run as a daemon and still broadcast playback data regardless of where playback is actually happening. in the screenshot below, playback happens on iphone but the data is still broadcasted locally. i want sptlrx (a cli lyrics tool that reads from mpris and spotify desktop's callback) to detect spotifyd in companion mode and access playback progress for synced lyrics