refactor: Replace hardcoded node paths with constants and remove ScoreComponent.

scripts/UI/Hud.cs

@@ -1,4 +1,5 @@
 using Godot;
+using Mr.BrickAdventures;
 using Mr.BrickAdventures.Autoloads;
 using Mr.BrickAdventures.scripts.components;
 
@@ -15,7 +16,7 @@ public partial class Hud : Control
 
     public override void _Ready()
     {
-        _gameManager = GetNode<GameManager>("/root/GameManager");
+        _gameManager = GetNode<GameManager>(Constants.GameManagerPath);
     }
 
     public override void _Process(double delta)