Add FootstepGfx and JumpGfxComponent; implement particle effects for footsteps and jumps

scripts/components/JumpGfxComponent.cs

@@ -0,0 +1,35 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+[GlobalClass]
+public partial class JumpGfxComponent : Node2D
+{
+    [Export] public PackedScene ParticleScene { get; set; }
+    [Export] public PlayerController Controller { get; set; }
+
+    public override void _Ready()
+    {
+        if (Controller == null)
+        {
+            GD.PrintErr("JumpGfxComponent must have a reference to a PlayerController.");
+            SetProcess(false);
+            return;
+        }
+        
+        Controller.JumpInitiated += OnJumpInitiated;
+    }
+
+    private void OnJumpInitiated()
+    {
+        SpawnGfx();
+    }
+
+    private void SpawnGfx()
+    {
+        var particleInstance = ParticleScene.Instantiate<GpuParticles2D>();
+        particleInstance.GlobalPosition = GlobalPosition;
+        GetTree().CurrentScene.AddChild(particleInstance);
+        particleInstance.Emitting = true;
+    }
+}