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/entities/ai/ConditionalGoal.java

@@ -0,0 +1,69 @@
+package com.tiedup.remake.entities.ai;
+
+import java.util.EnumSet;
+import java.util.function.BooleanSupplier;
+import net.minecraft.world.entity.ai.goal.Goal;
+
+/**
+ * Wrapper goal that only executes when a condition is met.
+ * Used to conditionally enable/disable AI goals at runtime.
+ *
+ * Example: ConditionalGoal(new KidnapperFindTargetGoal(), () -> merchant.isHostile())
+ */
+public class ConditionalGoal extends Goal {
+
+    private final Goal wrappedGoal;
+    private final BooleanSupplier condition;
+
+    public ConditionalGoal(Goal goal, BooleanSupplier condition) {
+        this.wrappedGoal = goal;
+        this.condition = condition;
+        this.setFlags(goal.getFlags());
+    }
+
+    @Override
+    public boolean canUse() {
+        return condition.getAsBoolean() && wrappedGoal.canUse();
+    }
+
+    @Override
+    public boolean canContinueToUse() {
+        return condition.getAsBoolean() && wrappedGoal.canContinueToUse();
+    }
+
+    @Override
+    public boolean isInterruptable() {
+        return wrappedGoal.isInterruptable();
+    }
+
+    @Override
+    public void start() {
+        wrappedGoal.start();
+    }
+
+    @Override
+    public void stop() {
+        wrappedGoal.stop();
+    }
+
+    @Override
+    public boolean requiresUpdateEveryTick() {
+        return wrappedGoal.requiresUpdateEveryTick();
+    }
+
+    @Override
+    public void tick() {
+        wrappedGoal.tick();
+    }
+
+    @Override
+    public void setFlags(EnumSet<Flag> flags) {
+        super.setFlags(flags);
+        wrappedGoal.setFlags(flags);
+    }
+
+    @Override
+    public EnumSet<Flag> getFlags() {
+        return wrappedGoal.getFlags();
+    }
+}