Modify preset_mode to use all lowercase for consistent translation pickup

custom_components/tuya_local/devices/drexma_et7aw_thermostat.yaml

@@ -37,11 +37,11 @@ entities:
         name: preset_mode
         mapping:
           - dps_val: "Smart"
-            value: Program
+            value: program
           - dps_val: "Manual"
-            value: Manual
+            value: manual
           - dps_val: "Anti_frozen"
-            value: Away
+            value: away
       - id: 105
         type: integer
         name: current_temperature