Remove Main scene and script, add StateManagement library, update project structure documentation

Scripts/Core/Main.cs

@@ -0,0 +1,26 @@
+using EinSoftworks.Events;
+using EinSoftworks.Input;
+using EinSoftworks.Utilities;
+using Godot;
+
+namespace Voider;
+
+/// <summary>
+/// Main entry point for the Voider game.
+/// </summary>
+public partial class Main : Node2D
+{
+    public override void _Ready()
+    {
+        GD.Print("Voider game initialized!");
+        GD.Print("Libraries loaded:");
+        GD.Print("- Utilities");
+        GD.Print("- Input");
+        GD.Print("- Events");
+    }
+
+    public override void _Process(double delta)
+    {
+        // Game loop logic here
+    }
+}