Inconsistent Fan Speed Display
**Describe The Bug:**
Home app thinks the Ac Fan value is in Percentage 0-100, but the actual hardware is in Integer 0-5

**To Reproduce:**
Have an connected AC with range from 0-5 of fan speed, Open home app and click to edit the fan speed, 
Set the speed to “60%” on the slider
Observe that the value displayed is “3%” that corresponds to 60% (3) in a 0-5 scale



**Expected behavior:**
The plugin should either report the value in Percentage to the home app, 60% (and internally round to the nearest speed supported) or if possible, tell the Home app the available range so the value is both in a 0-5 scale 

**Logs:**

```
Not Applicable
```

**Plugin Config:**

```
Not Applicable
```

**Screenshots:**

![Image](https://github.com/user-attachments/assets/d6322c11-0152-44b1-908c-1be8a2d94c04)
![Image](https://github.com/user-attachments/assets/9b0ab607-d08c-4b17-8607-4d8d4e7fadcb)

**Environment:**



* **Plugin Version**: V2.0.0 Beta-4
* **Homebridge Version**: 2
* **Node.js Version**: 22.13.1
* **NPM Version**: <!-- npm -v -->
* **Operating System**:  Ubuntu

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