Shadow System Enhancements and Renderer Optimizations

[AlexMollard]

This pull request includes several improvements to our shadow system, renderer optimizations, and some additional features:

• Moved shadow map, depth image, and related logic to the renderer
• Implemented a better camera frustum for shadows, including:
  • Added a bounding box frustum around the camera for shadows
  • Fixed the camera frustum function for shadow maps
  • Optimized camera frustum updates to occur only when necessary
• Added ability to adjust shadow map size dynamically
• Refactored light structures
• Implemented a new shadow system to support multiple shadows and advanced techniques
• Moved all shadow logic out of the renderer for better organization
• Added grass material and changed clear color
• Implemented moving platforms and power-ups in the platformer game
• Added ability to select a shadow map for debugging purposes
• Fixed dirlight position issues in the light matrix calculation
• Re-added ability to update shadow map on the fly
• Added GLM_ENABLE_EXPERIMENTAL to the slime oddyssey compile definitions
• Updated README.md image

These changes aim to improve shadow rendering, enhance game features, and optimize our rendering pipeline. Please review and provide feedback.

[DeclanRogers]

Looks good, maybe next time a few more comments