Add cheat documentation, enable input repeat for L and R, show cheat category name

docs/Cheats.md

@@ -0,0 +1,15 @@
+# Cheats
+Pico Launcher supports cheats from a `usrcheat.dat` file placed at `/_pico/usrcheat.dat`. The file stores the cheat codes, as well as which cheats are enabled. When a game is started which has cheats enabled, the enabled cheats are passed to Pico Loader.
+
+## Usage
+To display the available cheats highlight a game in the rom browser and press Y to access the cheats panel.
+
+![Cheats panel](images/Cheats.png)
+
+### Controls
+- DPAD up/down: Scroll through the list of cheats.
+- L and R: Scroll quickly when there are many cheats.
+- A: Toggle a cheat on/off, or go into a cheat category.
+- B: Go up in the cheat hierarchy, or close the cheats panel when at the root.
+- Y: Close the cheats panel.
+- X: Disable all cheats.

docs/Usage.md

@@ -12,6 +12,7 @@ From here you can browse your SD card to launch homebrew and games.
 - A: Open a folder, or to launch a homebrew or game.
 - B: Go to the parent folder or close a menu.
 - L and R: Scroll quickly when there are many items in a folder.
+- Y: Open the cheats panel (see [Cheats](Cheats.md)).
 
 The back arrow on the top left of the bottom screen can also be used to go up to the parent folder.