Add viomi.airp.v3 support

[viotemp1]

Hello,

Any chance to add viomi pro vxkj03? I tested all purifiers and only ma4/mb3 and can connect.
miiocli airpurifiermb4 --ip x.x.x.x --token xyz status
Power: on
AQI: None μg/m³
Mode: OperationMode.Favorite
LED brightness level: 2875
Buzzer: True
Child lock: None
Filter life remaining: None %
Filter hours used: None
Motor speed: None rpm
Favorite RPM: None rpm

[syssi]

Do you know the model identifier (f.e. leshow.heater.bs1) of your device?

[viotemp1]

Model: viomi.airp.v3
Hardware version: esp8266
Firmware version: 2.0.7