feat: Implement Crimson Labyrinth FPS game

[tomadowley]

This pull request introduces the core gameplay mechanics and assets for the Crimson Labyrinth, a retro 3D FPS game built from scratch.

Changes include:

• README.md: Updated to reflect the new project name and details, including run instructions and controls.
• assets/script.js:
  • Implemented the game loop, rendering engine (raycasting), player controls (keyboard and mouse).
  • Added game elements such as walls, enemies, pickups (health, ammo, armor, keys), projectiles, and particles.
  • Developed HUD, minimap, and game state management (health, armor, ammo, score, paused, game over, victory).
  • Integrated procedural sound effects using the Web Audio API.
  • Created enemy AI for chasing and attacking the player.
  • Implemented weapon firing mechanics and hit detection.
• assets/style.css:
  • Styled the game interface, including the main game shell, viewport, overlay, and mission information panels.
  • Designed controls and typography to match the retro aesthetic.
• index.html:
  • Set up the basic HTML structure for the game.
  • Linked the CSS and JavaScript files.
  • Included initial UI elements like the start button, game overlay, and mission brief.