Remove internal phase comments and format code

Strip all Phase references, TODO/FUTURE roadmap notes, and internal
planning comments from the codebase. Run Prettier for consistent
formatting across all Java files.

src/main/java/com/tiedup/remake/items/ItemClassicCollar.java

@@ -8,7 +8,6 @@ import net.minecraft.world.item.Item;
  * Standard collar for marking ownership.
  *
  * Based on original ItemCollar from 1.12.2
- * Phase 1: No ownership system yet, just a basic wearable collar
  * Note: Collars have maxStackSize of 1 (unique items)
  */
 public class ItemClassicCollar extends ItemCollar {