Support running_state for TS0601_thermostat

[krasnoukhov]

Device: https://www.zigbee2mqtt.io/devices/TS0601_thermostat.html

It supports position (also known as valvePos) of valve being open in %, so if it's non-zero it would now report running_state as heat, which is quite useful in HA interface.

This will likely bring support to GS361A-H04 as well since it exposes position:

zigbee-herdsman-converters/devices/siterwell.js

Line 34 in 5e61dd3

exposes: [e.child_lock(), e.window_detection(), e.battery(), e.valve_detection(), e.position(), exposes.climate()

As well as running state:

zigbee-herdsman-converters/devices/siterwell.js

Line 37 in 5e61dd3

.withRunningState(['idle', 'heat'], ea.STATE)],

[Koenkk]

thanks!