[Release] Introducing driver for Zigbee Thermostat Stelpro Allia

I have the Orleans heaters and will gladly test! The driver I am using now works but it doesn't conform to the Thermostat JSON outlined in the Hubitat docs which will surely be a problem in the future. Mentioned here...

My heaters have no fan, just convection. Here is the old driver for reference.

And the manual for reference...