Add handling of clientNotification on FromRadio, sending a pubsub message

meshtastic/__init__.py

@@ -35,6 +35,7 @@ type of packet, you should subscribe to the full topic name.  If you want to see
 - `meshtastic.receive.data.portnum(packet)` (where portnum is an integer or well known PortNum enum)
 - `meshtastic.node.updated(node = NodeInfo)` - published when a node in the DB changes (appears, location changed, username changed, etc...)
 - `meshtastic.log.line(line)` - a raw unparsed log line from the radio
+- `meshtastic.clientNotification(notification, interface) - a ClientNotification sent from the radio
 
 We receive position, user, or data packets from the mesh.  You probably only care about `meshtastic.receive.data`.  The first argument for
 that publish will be the packet.  Text or binary data packets (from `sendData` or `sendText`) will both arrive this way.  If you print packet