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

index.html

@@ -204,6 +204,7 @@
     <script src="src/scenes/PrologueScene.js"></script> <!-- 🎬 Story Prologue -->
     <script src="src/scenes/UIScene.js"></script>
     <script src="src/scenes/StoryScene.js"></script>
+    <script src="src/scenes/TownSquareScene.js"></script>
 
     <!-- 🛠️ CRAFTING SYSTEM -->
     <script src="src/systems/CraftingSystem.js"></script>