Leds and buttons events (#266)

Use events and commands to control custom onboard leds and buttons. Can be used to communicate with an external Python script via a WebSocket API running in a container alongside LVA.

pyproject.toml

@@ -32,6 +32,7 @@ dependencies = [
     "zeroconf<1",
     "getmac<1",
     "types-protobuf",
+    "websockets==12",
     "webrtc-noise-gain>=1,<2",
 ]
 dynamic = ["version"]