Add product detail for Fancy LEDs 3

PR #3082

custom_components/tuya_local/devices/lytmi_hdmisync_backlight.yaml

@@ -3,6 +3,9 @@ products:
   - id: js0t2z9y1tnphvds
     manufacturer: Lytmi
     model: Fantasy/Neo 3
+  - id: s9tscadzzt5s2cz3
+    manufacturer: Fancy LEDs
+    model: 3 HDMI 2.1 sync box
 entities:
   - entity: light
     dps: