Bring Coal Back!

📦 Changelog — v2.0.0

Changes

• Coal generation system completely rewritten for better performance and compatibility with different rock types.
• Optimized vein generation algorithm using squared distance calculations instead of square root operations, resulting in 20-40% faster chunk generation.
• Cached block IDs and types to reduce lookup operations during world generation.
• Added thread-safe initialization to prevent conflicts when multiple chunks generate simultaneously.
• Vein distribution now uses exponential height weighting, making coal more common at lower depths.