fix(inkbird_c236t_thermostat): timer start is conditional on mode

- disable in Manual and Thermostat modes, it is only relevant for Timer and Program mode

Issue #5010

custom_components/tuya_local/devices/inkbird_c236t_thermostat.yaml

@@ -215,7 +215,15 @@ entities:
       - id: 119
         type: boolean
         name: switch
-
+      - id: 103
+        type: integer
+        name: available
+        mapping:
+          - dps_val: 1
+            value: true
+          - dps_val: 2
+            value: true
+          - value: false
   - entity: button
     name: Mute alarm
     icon: "mdi:volume-off"