Add support for 2024.8 FanEntityFeature TURN_ON and TURN_OFF (#95)

This is required for the Heat Exchanger to be turned on and off in 2025.1, even though the blog mentions the deprecation will happen in 2025.2.

custom_components/jcihitachi_tw/fan.py

@@ -220,6 +220,9 @@ def unique_id(self):
 
     def calculate_supported_features(self):
         support_flags = 0
+        if self._thing.support_code.Switch != "unsupported":              
+            support_flags |= FanEntityFeature.TURN_ON
+            support_flags |= FanEntityFeature.TURN_OFF
         if self._thing.support_code.FanSpeed != "unsupported":
             support_flags |= FanEntityFeature.SET_SPEED
         if self._thing.support_code.BreathMode != "unsupported":
@@ -277,4 +280,4 @@ def turn_off(self, **kwargs):
         """Turn the device off."""
         _LOGGER.debug(f"Turn {self.name} off")
         self.put_queue(status_name="Switch", status_str_value="off")
-        self.update()
+        self.update()