Support air purifier device type in homekit

Tags: #<Tag:0x00007f73931d9508>

Currently, HASS-homekit exposes air purifiers as fans in homekit while homekit now has air-purifier device type that is being used by homebridge plugins (https://github.com/clauzewitz/homebridge-xiaomi-purifier#readme).

Request is to support air-purifiers as a device class in homekit integration.

Benefits:
Full features: reports temperature, humidity, aqi
Additional features: control led, buzzer, mode

Would be nice to have it also for Google Assistant

Any update on that issue?

Interested on this feature as well, would like to have the correct AQI mappings in homekit.

This feature will help to control air purifier that support homekit only.