add support for vrf control unit

[xquyan]

I had a vrf control unit (lumi.airrtc.vrfegl01) connected to aqara app through E1 Gateway, and it worked fine as several thermostats. But when I added the E1 to AqaraGateway in HA, it only shows a sensor saying there are 4 channels.

So could you please add support for that? Thanks a lot!

[niceboygithub]

The vrf support multiple channels. I still have no idea to implement to add several channel. You can use Alexxit/XiaomiGateway3 first.

[syxuxiaoliang]

我的VRF控制器加进去后有4个实体，不过不能控制空调，温度都显示为0，选温度，先成制热，然后组件显示又回到初始状态