Automatic cooling state management

In order to manage the thermostat cooling state for devices like Danfoss thermostats that do not have inside Home Center a cooling state switch an automatic logic is created and enabled by the config parameter "enablecoolingstatemanagemnt" in config.json.

If enabled the plugin will show an OFF state inside the Home app (and other HomeKit apps) if the thermostat temperature is below 12° C, ON otherwise. If you switch the thermostat off from the Home app (and other HomeKit apps) the plugin will set a temperature of 12° C with a 0 timeout. If you switch the thermostat to HEAT from the Home app (and other HomeKit apps) the plugin will set a temperature of 21° C with a 0 timeout. If you switch the thermostat to other state (COOL or AUTO) it will be forced to HEAT.