Add stop_dimming method

To stop a dimming transition the DimmingDeltaFeaturePut can be used to
set a stop action. This can be useful if someone wants to dim a light to
the max/min value within a dedicated transition time but stop when for
example a btn was released.

aiohue/v2/controllers/lights.py

@@ -6,7 +6,9 @@
     ColorFeaturePut,
     ColorPoint,
     ColorTemperatureFeaturePut,
+    DeltaAction,
     DimmingFeaturePut,
+    DimmingDeltaFeaturePut,
     DynamicsFeaturePut,
     EffectsFeaturePut,
     EffectStatus,
@@ -100,3 +102,11 @@ async def set_state(
         elif effect is not None:
             update_obj.effects = EffectsFeaturePut(effect=effect)
         await self.update(id, update_obj)
+
+    async def stop_dimming(
+        self, id: str
+    ) -> None:
+        """Stop dimming action."""
+        update_obj = LightPut()
+        update_obj.dimming = DimmingDeltaFeaturePut(action=DeltaAction.STOP)
+        await self.update(id, update_obj)