Pacxon (#12)

* Add GridMovementAbility and PacXonGridInteractor for grid-based movement; integrate with PlayerController and PacXonLevel

* Add GhostMovementComponent and PacXonTrailComponent; integrate ghost movement and trail features in PacXonLevel

* Update main menu button focus and add new movement abilities; adjust player and ghost initialization in PacXonLevel

scripts/components/Movement/GridMovementAbility.cs

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+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class GridMovementAbility : MovementAbility
+{
+    [Export] public float MoveSpeed { get; set; } = 0.15f; // Time in seconds between moves
+    [Export] public int GridSize { get; set; } = 16; // Size of one grid cell in pixels
+
+    private Vector2 _currentDirection = Vector2.Zero;
+    private Vector2 _nextDirection = Vector2.Zero;
+    private Timer _moveTimer;
+    
+    [Signal]
+    public delegate void MovedEventHandler(Vector2 newPosition);
+    
+    public override void Initialize(PlayerController controller)
+    {
+        base.Initialize(controller);
+        _moveTimer = new Timer { WaitTime = MoveSpeed, OneShot = false };
+        AddChild(_moveTimer);
+        _moveTimer.Timeout += OnMoveTimerTimeout;
+        _moveTimer.Start();
+    }
+    
+    public override Vector2 ProcessMovement(Vector2 currentVelocity, double delta)
+    {
+        GD.Print($"Player position: {_body.Position}, {_body.GlobalPosition}");
+        
+        var inputDirection = _input.MoveDirection;
+        var newDirection = Vector2.Zero;
+        
+        if (Mathf.Abs(inputDirection.Y) > 0.1f)
+        {
+            newDirection = new Vector2(0, Mathf.Sign(inputDirection.Y));
+        }
+        else if (Mathf.Abs(inputDirection.X) > 0.1f)
+        {
+            newDirection = new Vector2(Mathf.Sign(inputDirection.X), 0);
+        }
+    
+        if (newDirection != Vector2.Zero && newDirection != -_currentDirection)
+        {
+            _nextDirection = newDirection;
+        }
+        
+        return Vector2.Zero; 
+    }
+    
+    private void OnMoveTimerTimeout()
+    {
+        _currentDirection = _nextDirection;
+        if (_currentDirection == Vector2.Zero) return;
+
+        _body.Position += _currentDirection * GridSize;
+        EmitSignal(SignalName.Moved, _body.GlobalPosition);
+    }
+}

scripts/components/Movement/GridMovementAbility.cs.uid

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+uid://ctm5glmeu502l