Support for Shelly 2PM calibration in cover mode over Matter.

[Mircho]

Describe the enhancement

Current Matter controller vendors refer to "vendor app" to execute calibration for window cover controllers. Matter spec does provide enough provisions for the device to report that has position control BUT can not report position, as it's not calibrated. And there is a way to initiate a calibration using a read-write bit that can be used to trigger calibration.

Device or feature details

Shelly 2PM (Gen3, Gen4) in cover mode.

Use cases

Reduce customer onboarding friction. If the customer has decided to work with HA, then he should not be forced to jump to into the vendor app.

Anything else?

No response