Add support NEW WIDETECH 7 speed AC fan WPF-16SW5

custom_components/tuya_local/devices/nwt_7speed_fan.yaml

@@ -0,0 +1,22 @@
+name: NEW WIDETECH 7 speed AC fan
+products:
+  - id: qdxgvuj2ncbx5aha
+    name: NEW WIDETECH 7 speed AC fan WPF-16SW5
+primary_entity:
+  entity: fan
+  dps:
+    - id: 1
+      type: boolean
+      name: switch
+    - id: 3
+      type: integer
+      name: speed
+      range:
+        min: 1
+        max: 7
+secondary_entities:
+  - entity: light
+    dps:
+      - id: 15
+        type: boolean
+        name: switch