add manual-powerplay & format powerplay

docs/03-setup-special-feature/02-gamble.md

@@ -4,20 +4,4 @@ sidebar_position: 2
 
 # Gamble
 
-## Overview
+> To be added
-
-![Gamble Preview](./img/gamble/gamble-preview.png)
-
----
-
-## Implementation
-
-Only need to set up the background in the **main scene**.
-
-#### Landscape
-
-![Gamble Background - Landscape](./img/gamble/gamble-bg-landscape.png)
-
-#### Portrait
-
-![Gamble Background - Portrait](./img/gamble/gamble-bg-portrait.png)