multi-satellite, VAD and Spotify Search

• Proper multi-satellite available now, multiple browsers can login to server and run voice/chat without crashing everything. You can set what room your in as well.
• The changeover to WebSocket for audio lost our neat VAD end-of-speech detection. It is back and latency is way better again!
• Also brought back our own Spotify tool. This now links in with Home Assistant for playing to Sonos devices in different rooms, but give you the proper "smarts" in your searches, so you don't have to give exact track names.