Adds procedural ground tile generation with chunking for improved performance.
Includes:
- Ground tile entity with debug text and cell information
- Grass and tree placement based on cell data
- Ground shader for visual representation
- Chunk loading and unloading system based on player position
Changes wind-related shader uniforms to be global.
This allows easier access and modification of these
parameters from other shaders or scripts, improving
the wind effect consistency across the scene.