Added client-wide state hash

Author: jath03

openrgb/orgb.py

@@ -411,6 +411,7 @@ def _callback(self, device: int, type: int, data: Any):
                     self.devices[device] = Device(data, device, self.comms)
                 else:
                     self.devices[device]._update(data)  # type: ignore
+                self.state_hash = hash("".join(str(dev.state_hash) for dev in self.devices if dev))
             except IndexError:
                 self.comms.requestDeviceNum()
         elif type == utils.PacketType.DEVICE_LIST_UPDATED:
@@ -643,3 +644,4 @@ def ee_devices(self):
         control mode.  These devices are suitable to use with an effects engine.
         '''
         return [dev for dev in self.devices for mode in dev.modes if mode.name.lower() == 'direct']
+