Please add support for Curtains
Daer Tuya Team, 

Thank you for creating this plug-in, I was eager to have it, really appreciate that. 

It would be great if you add support for [Tuya supported Curtains](https://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20210624133132&SearchText=tuya+curtain+motor).

Thank you