change AQI to string

[fama-lama]

Hey, so love the project. Completely removed vesync from my home assistant. Something I got confused about was the AQI which doesn't follow normal AQI definition, or unit.

Then I realise that
AQI 1 means 0-50 ug/m³ (excellent)
AQI 2 means 51-100 ug/m³ (good)
AQI 3 means 101-150 ug/m³ (moderate)
AQI 4 means more than 151 ug/m³ (bad)

I made a template sensor In home assistant but I think it would be even better if it was implemented natively. Would increase sensor parity with the vesync integration.

[tuct]

created issue to fix this asap
#41 (comment)

[tuct]

you can adopt this by adding a custom aql sensor (template number) that uses the PM2.5 values!
The Levoit Vital and Core MCU provides this as a simple number 0-4, no chance toi change this.