Add Related Projects section with all Fast* ecosystem links

Author: Andre Stubbe

README.md

@@ -521,6 +521,15 @@ Your support helps maintain and improve FastRobot!
 
 ---
 
+## Related Projects
+
+- [FastHotkey](https://github.com/andrestubbe/FastHotkey) - Ultra-fast global hotkey library
+- [FastClipboard](https://github.com/andrestubbe/FastClipboard) - Ultra-fast clipboard access
+- [FastGraphics](https://github.com/andrestubbe/FastGraphics) - GPU-accelerated graphics
+- [FastTheme](https://github.com/andrestubbe/FastTheme) - OS-aware Display/Theme monitor
+
+---
+
 ## Keywords
 
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