CCT lightbulb: Invert color temp

As with other lights, the 0-1000 relates to Kelvin temperature, but the
integration is still using mired, as HA used to only support that.

Issue #730

custom_components/tuya_local/devices/cct_lightbulb.yaml

@@ -25,6 +25,8 @@ primary_entity:
       range:
         min: 0
         max: 1000
+      mapping:
+        - invert: true
     - id: 25
       name: scene
       type: hex