Add hand gesture recognition system under computer vision projects

Author: Gaurav-Borse-dev

projects/computer-vision/gesture-recognition-system/README.md

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+# Hand Gesture Recognition System
+
+A real-time hand gesture recognition system using MediaPipe and OpenCV to control system actions.
+
+## Features
+- Cursor control using hand tracking
+- Scroll using finger movement
+- Click using 3-finger gesture
+- Fullscreen toggle using both hands
+
+## Tech Stack
+- Python
+- OpenCV
+- MediaPipe
+- PyAutoGUI
+
+## Use Case
+This project enables touchless interaction with a computer using hand gestures.