feat(D-01): add IItemComponent interface for data-driven item behaviors

src/main/java/com/tiedup/remake/v2/bondage/component/IItemComponent.java

@@ -0,0 +1,21 @@
+package com.tiedup.remake.v2.bondage.component;
+
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemStack;
+
+/**
+ * A reusable behavior module for data-driven bondage items.
+ * Components are declared in JSON and instantiated per item definition.
+ */
+public interface IItemComponent {
+
+    default void onEquipped(ItemStack stack, LivingEntity entity) {}
+
+    default void onUnequipped(ItemStack stack, LivingEntity entity) {}
+
+    default void onWornTick(ItemStack stack, LivingEntity entity) {}
+
+    default boolean blocksUnequip(ItemStack stack, LivingEntity entity) {
+        return false;
+    }
+}