Snake game added

[Ayush3941]

🚀 PR: Add Polished Snake Game with GUI and Persistent High Score

#22

✅ Features Implemented:

• Modern Tkinter-based Snake Game UI
• Responsive movement using arrow keys
• Food spawning with collision avoidance
• Real-time score and high score display
• Persistent high score saved in snake_game_save.json
• Smooth game loop with after() callback
• Auto game over detection on collision
• Restart button with state reset

📁 File Structure:

📄 snake/snake_game.py          # Main game logic and UI
📄 snake/snake_game_save.json   # Auto-generated save file (high score)

🧠 Design Considerations:

• Minimalist retro look with soft color contrast
• Configurable grid size and cell size for scalability
• Separate UI layer (labels/buttons) and canvas for rendering

🔜 Future Improvements (Not in Scope):

• Pause/Resume functionality
• Power-ups, obstacles, or multiple difficulty levels
• Kivy or PyGame migration for mobile/animation enhancements