Update README.md

Author: Andy (Qingyuan) Li

README.md

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 - Keybinds, help menu, options menu, and other QOL features
 - Packages for easy installation (support for Windows, MacOS, Linux)
 
+![diagram](https://www.chiefdelphi.com/uploads/default/original/3X/4/b/4b3d36734577676d8211377c06b7b3f657fd1967.png)
+
 ## Future Updates
 
 - Enable resizing