Add bridge utility method to LinkPlayController

src/linkplay/controller.py

@@ -29,6 +29,14 @@ async def discover_bridges(self) -> None:
         ]
         self.bridges.extend(new_bridges)
 
+    async def add_bridge(self, bridge_to_add: LinkPlayBridge) -> None:
+        """Add given LinkPlay device if not already added."""
+
+        # Add bridge
+        current_bridges = [bridge.device.uuid for bridge in self.bridges]
+        if bridge_to_add.device.uuid not in current_bridges:
+            self.bridges.extend(bridge_to_add)
+
     async def discover_multirooms(self) -> None:
         """Attempts to discover multirooms on the local network."""