Inkbird ITC-308: add an extra idle state.

Issue #271

custom_components/tuya_local/devices/inkbird_itc308_thermostat.yaml

@@ -62,6 +62,10 @@ primary_entity:
       type: string
       name: hvac_action
       mapping:
+        - dps_val: "0"
+          icon: "mdi-thermometer-off"
+          icon-priority: 5
+          value: idle
         - dps_val: "1"
           icon: "mdi:snowflake"
           icon_priority: 5