chore(doel_tiplus_litterbox.yaml): address review comments

- Mark Developer mode (DPS 135) as hidden
- Rename "Sleep mode" to "Sleep"
- Rename "Bag change mode" to "Bag change"

custom_components/tuya_local/devices/doel_tiplus_litterbox.yaml

@@ -224,12 +224,13 @@ entities:
     name: Developer mode
     category: config
     icon: "mdi:cog"
+    hidden: true
     dps:
       - id: 135
         type: boolean
         name: switch
   - entity: switch
-    name: Sleep mode
+    name: Sleep
     category: config
     icon: "mdi:sleep"
     dps:
@@ -245,7 +246,7 @@ entities:
         type: boolean
         name: switch
   - entity: button
-    name: Bag change mode
+    name: Bag change
     icon: "mdi:bag-personal"
     dps:
       - id: 138