Feature Request: Set threshold for curtains for open closed
### Problem

Occasionally when updating the status of the curtains, the app returns a 99% closed, or 1% open, because of slight variations of opening and closing the curtains

### Solution

It would be great if we could set a threshold in homebridge that would still return fully opened or fully closed in the app. For example if I set my threshold as 5 then anything that comes back as under 5% open would come as fully closed in Homekit. 

### Alternatives

_No response_

### Additional context

_No response_