RGBCW lightbulb: add a fixed list of scenes to choose from.

These are the default scenes from the Tuya app.  No guarantees that they
will work with every lightbulb.

Was used for debugging the previous change.

custom_components/tuya_local/devices/rgbcw_lightbulb.yaml

@@ -97,3 +97,37 @@ secondary_entities:
         mapping:
           - scale: 60
             step: 60
+  - entity: select
+    name: Scene
+    icon: "mdi:palette"
+    category: config
+    dps:
+      - id: 25
+        type: string
+        name: option
+        optional: true
+        mapping:
+          - dps_val: "000c0d0000000000000000c80000"
+            # color: brown, static
+            value: Night
+          - dps_val: "010e0d0000840000000003e801f4"
+            # color: white, static
+            value: Read
+          - dps_val: "020e0d0000e80383000003e803e8"
+            # color: lt cyan, static
+            value: Working
+          - dps_val: "030e0d00001403e8000001f401f4"
+            # color: grey, static
+            value: Leisure
+          - dps_val: "04464602007803e803e800000000464602007803e8000a00000000"
+            # color: G+DkG, Breath, Mid speed
+            value: Soft
+          - dps_val: "05464601000003e803e800000000464601007803e803e80000000046460100f003e803e800000000464601003d03e803e80000000046460100ae03e803e800000000464601011303e803e800000000"
+            # color* R+G+B+Y+C+V, Flash, Mid speed
+            value: Colorful
+          - dps_val: "06464601000003e803e800000000464601007803e803e80000000046460100f003e803e800000000"
+            # color* R+G+B, Flash, Mid speed
+            value: Dazzling
+          - dps_val: "07464602000003e803e800000000464602007803e803e80000000046460200f003e803e800000000464602003d03e803e80000000046460200ae03e803e800000000464602011303e803e800000000"
+            # color* R+G+B+Y+C+V, Breath, Mid speed
+            value: Gorgeous