added multiple devices ability plus clkg with light accessory

[blvosh2]

Hi, i am new to all of this, i am mainly AI python developer.
i have clkg curtain switch with light so i added the support, i would be happy for any further help.
Thanks !

[0x5e]

Thanks @blvosh2 for the contribution!
I understand the project doesn't support well with "combination products" like yours (window curtain + light), and there's "fan + light", "diffuser + light", "camera + switch" and more, we are not able to enumerate completely for all combinations.
I'm not ready for support multiple device ability currently, and the accessory classes may incompatible with each others because the "dp code" definition for same feature various to different products (what a mess :( )

For this PR, I propose to use a conservative way for now, like FanAccessory does. In WindowCoveringAccessory, when LIGHT_ON exists, then call configureLight to create a light accessory.

For multiple device support, I prefer configurable way (like https://github.com/arachnetech/homebridge-mqttthing/blob/master/docs/Configuration.md), let user mapping relations between homekit service/characteristic and tuya schema, I will complete it when I'm free. what do you think of it?

[blvosh2]

I think its great !, i will start working on it at the weekend, thanks for your huge contribution with this plugin !, i will update as soon as i will complete it.