Add FallOnDetectionComponent and CleanupOnCollisionComponent; implement falling detection and cleanup on collision

scripts/components/CleanupOnCollisionComponent.cs

@@ -0,0 +1,46 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class CleanupOnCollisionComponent : Node
+{
+    [Export(PropertyHint.Range, "0, 5, 0.1")] public float CleanupDelay { get; set; } = 0.5f;
+    
+    private RigidBody2D _body;
+    private CleanupComponent _cleanupComponent;
+    private bool _isCleaningUp = false;
+    
+    public override void _Ready()
+    {
+        _body = Owner as RigidBody2D;
+        if (_body == null)
+        {
+            GD.PrintErr("CleanupOnCollisionComponent must be attached to a RigidBody2D.");
+            SetProcess(false);
+            return;
+        }
+
+        _cleanupComponent = Owner.GetNode<CleanupComponent>("CleanupComponent");
+        if (_cleanupComponent == null)
+        {
+            GD.PrintErr("CleanupOnCollisionComponent requires a CleanupComponent on the same node.");
+            SetProcess(false);
+            return;
+        }
+
+        _body.BodyEntered += (_) => OnBodyEntered();
+    }
+    
+    private async void OnBodyEntered()
+    {
+        if (_isCleaningUp) return;
+        
+        _isCleaningUp = true;
+        
+        await ToSignal(GetTree().CreateTimer(CleanupDelay), Timer.SignalName.Timeout);
+
+        _cleanupComponent?.CleanUp();
+    }
+
+}