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

Autoloads/SpeedRunManager.cs

@@ -0,0 +1,62 @@
+using System.Collections.Generic;
+using Godot;
+
+namespace Mr.BrickAdventures.Autoloads;
+
+public partial class SpeedRunManager : Node
+{
+    public bool IsRunning { get; private set; } = false;
+    public bool IsVisible { get; private set; } = true;
+    
+    private double _startTime;
+    private double _levelStartTime;
+    private List<double> _splits = [];
+    
+    [Signal] public delegate void TimeUpdatedEventHandler(double totalTime, double levelTime);
+
+    public override void _Process(double delta)
+    {
+        if (!IsRunning || !IsVisible) return;
+        
+        EmitSignalTimeUpdated(GetCurrentTotalTime(), GetCurrentLevelTime());
+    }
+
+    public void StartTimer()
+    {
+        _startTime = Time.GetTicksMsec() / 1000.0;
+        _levelStartTime = _startTime;
+        _splits.Clear();
+        IsRunning = true;
+        GD.Print("Speedrun timer started.");
+    }
+    
+    public void StopTimer()
+    {
+        if (!IsRunning) return;
+        IsRunning = false;
+        var finalTime = GetCurrentTotalTime();
+        GD.Print($"Speedrun finished. Final time: {FormatTime(finalTime)}");
+        
+        // Save personal best if applicable
+    }
+
+    public void Split()
+    {
+        if (!IsRunning) return;
+        
+        var now = Time.GetTicksMsec() / 1000.0;
+        var splitTime = now - _levelStartTime;
+        _splits.Add(splitTime);
+        _levelStartTime = now;
+        GD.Print($"Split recorded: {FormatTime(splitTime)}");
+    }
+    
+    public double GetCurrentTotalTime() => IsRunning ? (Time.GetTicksMsec() / 1000.0) - _startTime : 0;
+    public double GetCurrentLevelTime() => IsRunning ? (Time.GetTicksMsec() / 1000.0) - _levelStartTime : 0;
+    
+    public static string FormatTime(double time)
+    {
+        var span = System.TimeSpan.FromSeconds(time);
+        return $"{(int)span.TotalMinutes:00}:{span.Seconds:00}.{span.Milliseconds:000}";
+    }
+}