Implement individual hitboxes for asteroids

[wannerdev]

Description

Fixes collision detection for asteroids by giving each individual asteroid its own hitbox instead of treating the entire swarm as a single collision object.

Changes

• Removed single HitBox from AsteroidSwarm parent entity
• Added individual HitBox component to each Asteroid child entity
• Each asteroid now has a radius of 2.5 for precise collision detection
• Added Level component to individual asteroids for proper collision handling
• Improves collision accuracy for asteroid-satellite interactions

Bug Details

Before: The entire asteroid swarm had one hitbox (radius 14.0) at the swarm center, making collision detection imprecise and treating all asteroids as a single object.

After: Each asteroid has its own hitbox (radius 2.5) at its actual position, enabling accurate per-asteroid collision detection.

Benefits

• More realistic and fair collision detection
• Players can navigate between asteroids in a swarm
• Individual asteroids can be destroyed separately
• Better gameplay experience with precise physics
• Matches visual representation of separate asteroids

Technical Details

• Asteroid hitbox radius: 2.5 (appropriate for visual size)
• Previous swarm hitbox radius: 14.0 (covered entire cluster)
• Each asteroid is a child entity with its own Transform and HitBox
• Collision system now detects individual asteroid collisions

Testing

• Launch satellites through asteroid swarms
• Verify collisions only occur when hitting individual asteroids
• Check that satellites can pass between asteroids safely
• Confirm each asteroid can be destroyed independently
• Test with debug mode to visualize individual hitboxes

Related Issue

Fixes: Bug - Asteroids should have individual hitboxes