Shrapnel Explosions

Added:

• Realistic Debris Models: New high-quality models for block debris.
• Added small visual optical glares and reflections for realistic glass shards.
• Again) rethought config parameters:
  • HORIZONTAL_SPREAD: Determines the overall shape of the explosion cloud by blending the block's local outward vector with the global blast wave.
  • DEVIATION_SPREAD: Determines how much fragments from a single block will deviate from the ideal trajectory, forming a cone.

Fixed:

• Open Space Detection: Improved the system for detecting open spaces for debris flight paths.
• Slightly refined the air resistance system for lightweight objects.
• Fixed an issue where "ghost" shards could remain visible when a chunk was unloaded.