Add in RGBMatterRelay for dealing with matter lights

Add in RGBMatterRelay for dealing with matter lights

 * Required refactoring the interfaces pretty heavily, mainly RGBRelay
   -> RGBMQRelay being another layer
 * This also required fixing up the lights.yaml on consumption, because
   yaml unmarshalling requires all the various types to get things at
   different layers
 * There's a little wonkiness when it comes to relaydata, since I'm just
   using RGBRelayData over again and ignoring routing key on matter
 * No error checking besides an exit 1 when the websocket horks up for
   matter (ehhhhhhhhhhhh)