feat: add Snake game to tools menu

[Zuriefais]

feat: add Snake game to tools menu

This PR introduces a classic Snake arcade game to the tools menu, providing a simple interactive experience with adjustable difficulty.

Summary

What is the goal of this PR?
Add a playable Snake game to the tools menu with configurable difficulty levels and core gameplay mechanics.

What changes are included?

• Implemented a 15×15 game grid with wrap-around (teleporting) borders
• Added three difficulty levels (Easy, Medium, Hard) affecting game speed
• Introduced a pre-game difficulty selection screen
• Displayed the current score above the game grid
• Implemented self-collision detection (game over condition)
• Enabled continuous gameplay through wall wrapping

Additional Context

• The game is designed to be lightweight and responsive, with minimal impact on performance
• Wrap-around mechanics remove wall collision edge cases but require careful handling of position updates
• Reviewers may want to focus on game loop timing and collision detection logic

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AI Usage

Did you use AI tools to help write this code? Yes