Added the Netatmo Thermostat status

[giuliomagnifico]

Hi, I added these thermostat metrics:

netatmo_thermostat_boiler_status
netatmo_thermostat_setpoint
netatmo_thermostat_temperature

Works fine for me (and my thermostat, of course), but review the code...I vibe coded it without spending much time on reading all the API documents 😅
PS: Unfortunately I don’t have the valves to test with, so I didn’t include those metrics.

# HELP netatmo_thermostat_boiler_status Netatmo Energy boiler status (1=on, 0=off). Per-room when possibile, otherwise per-home.
# TYPE netatmo_thermostat_boiler_status gauge
netatmo_thermostat_boiler_status{home_id="60796ad062axx",home_name="Casa",room_id="",room_name=""} 0
# HELP netatmo_thermostat_setpoint Netatmo Energy target setpoint temperature in degrees Celsius.
# TYPE netatmo_thermostat_setpoint gauge
netatmo_thermostat_setpoint{home_id="60796ad062xxx",home_name="Casa",room_id="3096xx",room_name=""} 0
# HELP netatmo_thermostat_temperature Netatmo Energy measured room temperature in degrees Celsius.
# TYPE netatmo_thermostat_temperature gauge
netatmo_thermostat_temperature{home_id="60796ad062axxx",home_name="Casa",room_id="30964xxx",room_name=""} 17.9