Add InputDeviceIconSetSO configuration guide and related documentation

- Created a new markdown file detailing the configuration of InputDeviceIconSetSO.
- Included sections on system architecture, field explanations, image specifications, and complete workflow from setup to runtime.
- Documented the automatic device recognition logic and provided troubleshooting for common issues.
- Added references to relevant files and scripts for easier navigation.

Assets/_Game/Scripts/Editor/BaseGames.Editor.asmdef

@@ -31,7 +31,8 @@
         "BaseGames.Skills",
         "BaseGames.World.Map",
         "BaseGames.EventChain",
-        "BaseGames.VFX"
+        "BaseGames.VFX",
+        "Unity.InputSystem"
     ],
     "includePlatforms": [
         "Editor"