Add EventBus, SpeedRunManager, and GhostManager; implement ghost recording and playback features

scripts/UI/SpeedRunHud.cs

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+using Godot;
+using Mr.BrickAdventures.Autoloads;
+
+namespace Mr.BrickAdventures.scripts.UI;
+
+[GlobalClass]
+public partial class SpeedRunHud : Control
+{
+    [Export] private Label _timerLabel;
+    
+    private SpeedRunManager _speedRunManager;
+
+    public override void _Ready()
+    {
+        _speedRunManager = GetNode<SpeedRunManager>("/root/SpeedRunManager");
+        
+        _speedRunManager.TimeUpdated += OnTimerUpdated;
+        
+        Visible = _speedRunManager.IsVisible;
+    }
+
+    private void OnTimerUpdated(double totalTime, double levelTime)
+    {
+        _timerLabel.Text = SpeedRunManager.FormatTime(totalTime);
+    }
+}

scripts/UI/SpeedRunHud.cs.uid

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+uid://0jfdx0hufs55