add initial project files and configurations, including EventBus, systems, and resources

Code/UI/MainMenu.cs

@@ -0,0 +1,34 @@
+using Godot;
+
+namespace MaxEffort.Code.UI;
+
+[GlobalClass]
+public partial class MainMenu : Control
+{
+    [Export] private PackedScene _gameScene;
+    [Export] private CheckButton _muteButton;
+    
+    public override void _Ready()
+    {
+        AudioServer.SetBusMute(AudioServer.GetBusIndex("Master"), false);
+    }
+    
+    public void OnPlayPressed()
+    {
+        if (_gameScene != null)
+        {
+            GetTree().ChangeSceneToPacked(_gameScene);
+        }
+    }
+
+    public void OnQuitPressed()
+    {
+        GetTree().Quit();
+    }
+
+    public void OnMuteToggled(bool toggledOn)
+    {
+        var masterBus = AudioServer.GetBusIndex("Master");
+        AudioServer.SetBusMute(masterBus, toggledOn);
+    }
+}