DG: Natural Reproduction

Added

• Pasture Enrichment, Rotational Grazing & Feeding Trough Dynamics: Implemented complete pasture enrichment and overgrazing mechanics using strictly vanilla interactive blocks and native particle effects:
  • Multi-Structure Pasture Enrichment: Automatically detects vanilla feeding troughs (water cauldrons, composters with compost/crops), hay reserves (Blocks.HAY_BLOCK), natural water sources, and barn ceiling weather shelters within 16 blocks.
  • Well-Nourished Livestock State: Living in enriched pastures grants herds +25% faster autonomous breeding check intervals, +10% offspring scale recovery (up to 1.30x max), and periodic golden ParticleTypes.WAX_ON sparkle particles.
  • Dynamic Overgrazing Terrain Wear: Dense herds (5+ animals in an 8-block area) grazing without pasture rotation dynamically convert grass blocks into Blocks.DIRT (or Blocks.COARSE_DIRT for 8+ crowding), requiring pasture rotation to keep foraging grounds fertile.
• AnimalPastureHelper: Created single-purpose helper class managing pasture enrichment evaluation, overhead barn shelter scanning, overgrazing wear, and well-nourished sparkle effects.
• Dedicated GameRules: Registered natural-reproduction:pasture_enrichment (Boolean, default true) and natural-reproduction:overgrazing (Boolean, default true), integrated into /gamerule, /naturalreproduction command suite, and YACL screen.