LoliPickaxe Fabric

Compatibility-only port to Minecraft 1.21.6. Updates server-world access and projectile-collision signatures while preserving the frozen gameplay contract: no recipe, unbreakable extreme mining/combat, the defined 27 special drops, 32-block expanded right-click execution with lightning, 1024-block six-degree swing fallback, execution lifecycle and holder protection, same-item immunity, alternating bundled sounds, and no movement-speed boost. Built and release-contract verified with Java 21, Fabric Loader 0.19.3 and Fabric API 0.128.2+1.21.6; GitHub Actions passed.