Add support cloud type for thermostat / Alexa.TemperatureSensor

[fer662]

Basically allow interaction through Alexa for a thermostat-like device. It feels much more important than a TV which is supported. I reckon most of the work would be on the Alexa skill since adding the type is fairly straightforward (I'd happily do it and make a pull request but the repo for that is obviously private hehe)

• An enum for the mode (OFF; HEAT; COOL)
• Float for target temperature
• optional float for read-only current actual temperature

https://developer.amazon.com/en-US/docs/alexa/device-apis/alexa-thermostatcontroller.html