feat(expansion): implement Phase 3 (Town Restoration) and Phase 4 (Cannabis Textiles)

- Added TownSquareScene and linked it with M key transition
- Integrated TownRestorationSystem with material costs and inventory
- Added locked shop items in NPCShopSystem until buildings are restored
- Updated InteractionSystem to handle ruin restoration triggers
- Expanded Cannabis farming to yield Hemp Fiber
- Added Hemp Clothing crafting recipe and procedural icons
- Refactored StatusEffectSystem and NPCShopSystem to global classes

src/game.js

@@ -68,7 +68,7 @@ const config = {
             debug: false
         }
     },
-    scene: [BootScene, PreloadScene, TiledTestScene, StoryScene, PrologueScene, GameScene, UIScene],
+    scene: [BootScene, PreloadScene, TiledTestScene, StoryScene, PrologueScene, GameScene, UIScene, TownSquareScene],
     scale: {
         mode: Phaser.Scale.FIT,
         autoCenter: Phaser.Scale.CENTER_BOTH