Clean repo for open source release

Remove build artifacts, dev tool configs, unused dependencies,
and third-party source dumps. Add proper README, update .gitignore,
clean up Makefile.

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

@@ -0,0 +1,60 @@
+package com.tiedup.remake.items;
+
+import com.tiedup.remake.state.IRestrainable;
+import com.tiedup.remake.util.KidnappedHelper;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.item.ItemStack;
+
+/**
+ * Automatic Shock Collar - Shocks the wearer at regular intervals.
+ *
+ * Phase 14.1.5: Refactored to support IRestrainable (LivingEntity + NPCs)
+ *
+ * <p>Mechanics:</p>
+ * <ul>
+ *   <li><b>Self-Triggering:</b> Has an internal timer stored in NBT that shocks the entity when it reaches 0.</li>
+ *   <li><b>Unstruggable:</b> By default, cannot be escaped via struggle mechanics (requires key).</li>
+ * </ul>
+ */
+public class ItemShockCollarAuto extends ItemShockCollar {
+
+    private final int interval;
+
+    /**
+     * @param interval Frequency of shocks in TICKS (20 ticks = 1 second).
+     */
+    public ItemShockCollarAuto() {
+        this(600); // 30 seconds default
+    }
+
+    public ItemShockCollarAuto(int interval) {
+        super();
+        this.interval = interval;
+    }
+
+    public int getInterval() {
+        return interval;
+    }
+
+    /**
+     * Ensures the internal shock timer is cleaned up when the item is removed.
+     *
+     * Phase 14.1.5: Refactored to support IRestrainable (LivingEntity + NPCs)
+     */
+    @Override
+    public void onUnequipped(ItemStack stack, LivingEntity entity) {
+        IRestrainable state = KidnappedHelper.getKidnappedState(entity);
+        if (state != null) {
+            state.resetAutoShockTimer();
+        }
+        super.onUnequipped(stack, entity);
+    }
+
+    /**
+     * Prevents escaping through struggle mechanics for this specific collar type.
+     */
+    @Override
+    public boolean canBeStruggledOut(ItemStack stack) {
+        return false;
+    }
+}