ObeseCat

Introduces the Mighty Sword progression with new skill items (Shellbust Stab, Blastar Punch, Hellcry Punch, Icewolf Bite), transmutation recipes, Ancient City loot injection, skill-class tooltips, and full supporting sounds/models/textures. Adds a placeable Target Dummy entity with custom renderer, equipment menu/screen, and networked info-card toggle. Also refactors Manhattan Physicist spawn-egg initialization to configure villagers before entity add/tracking, updates obtainment docs/localization, and adds focused regression tests for the new systems.