Air Condition Air Purify Function Doesn't Work ("Read Only"; Reflects LG App Status OK!)
**Describe The Bug:**
Air Purify option in the Air Conditioner device is not working properly. I noticed it is "read only"; meaning that when I trigger it from Homebridge / HomeKit, it changes from On to Off (and back), but it doesn't actually engage the Air Purifier (Ionizer) within the Air Conditioner. What is weird, that is what I call "read only" is that if I turn on the Air Purify mode from the LG App / Remote Control, the widget in Homebridge reflects it turning on! The same when I turn it of; the widget / HomeKit switch turn off! But actually pressing it, doesn't do anything by itself.

I think the feature is currently reading the Air Purify state properly, but fails when needing to action on it to send a change command (either On or Off)

**To Reproduce:**
Enable the Air Purify switch in the plugin \ Air Conditioner device. Click on it in "Accesories" / HomeKit and it won't take action on the AC

**Expected behavior:**
Should properly toggle this functionality!
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* **Plugin Version**:
* Homebridge: v1.8.5
* Node.js:  v22.11.0

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