device: raise a CommandTimeoutError error on command timeout

bumble/core.py

@@ -91,6 +91,10 @@ class TimeoutError(Exception):
     """ Timeout Error """
 
 
+class CommandTimeoutError(Exception):
+    """ Command Timeout Error """
+
+
 class InvalidStateError(Exception):
     """ Invalid State Error """
 

bumble/device.py

@@ -784,6 +784,7 @@ class Device(CompositeEventEmitter):
             )
         except asyncio.TimeoutError:
             logger.warning('!!! Command timed out')
+            raise CommandTimeoutError()
 
     async def power_on(self):
         # Reset the controller