refactor: enhance GameStateStore integration and improve skill management

scripts/State/GhostSaveData.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace Mr.BrickAdventures.scripts.State;
+
+public class GhostSaveData
+{
+    public double BestTime { get; set; }
+    public List<GhostFrameDto> Frames { get; set; } = new();
+}
+
+public class GhostFrameDto
+{
+    public double Timestamp { get; set; }
+    public float X { get; set; }
+    public float Y { get; set; }
+}