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/tasks/UntyingTask.java

@@ -0,0 +1,35 @@
+package com.tiedup.remake.tasks;
+
+import com.tiedup.remake.state.IBondageState;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.level.Level;
+
+/**
+ * Phase 6: Abstract untying task (freeing a tied entity).
+ * Phase 14.2.6: Refactored to support any IBondageState entity (Players + NPCs)
+ *
+ * Based on original UntyingTask from 1.12.2
+ *
+ * Extends TimedInteractTask for untying operations:
+ * - Frees a tied entity over time
+ * - Drops bondage items on the ground when complete
+ */
+public abstract class UntyingTask extends TimedInteractTask {
+
+    /**
+     * Create a new untying task.
+     *
+     * @param targetState The target's IBondageState state
+     * @param targetEntity The target entity
+     * @param seconds Total duration in seconds
+     * @param level The world
+     */
+    public UntyingTask(
+        IBondageState targetState,
+        LivingEntity targetEntity,
+        int seconds,
+        Level level
+    ) {
+        super(targetState, targetEntity, seconds, level);
+    }
+}