Add Main Menu UI, alien models & editor configs

Add VS Code workspace/launch/settings for Unity development and a new MainMenu scene/UI (uxml, uss, tss) with MainMenuController and related assets. Import two alien character FBX models (with generated .meta settings) and add folder metadata. Update Git LFS pointers for a Game Kit scene and add modifications to Game Kit Controller assets (World Canvas material and Save Camera render texture) and ProjectSettings/QualitySettings. These changes bring initial UI/menu assets and character models into the project and add editor tooling/config for easier development.

Assets/Game/Menus/MainMenu/MainMenuController.cs

@@ -0,0 +1,46 @@
+using UnityEngine;
+using UnityEngine.UIElements; // Necesario para UI Toolkit
+using UnityEngine.SceneManagement; // Para cambiar de escena
+
+public class MainMenuController : MonoBehaviour
+{
+    private UIDocument _doc;
+    private Button _playButton;
+    private Button _settingsButton;
+    private Button _exitButton;
+
+    private void Awake()
+    {
+        // Obtenemos la referencia al documento
+        _doc = GetComponent<UIDocument>();
+        var root = _doc.rootVisualElement;
+
+        // Buscamos los botones por su nombre (el que pusimos en el UXML)
+        _playButton = root.Q<Button>("BtnPlay");
+        _settingsButton = root.Q<Button>("BtnSettings");
+        _exitButton = root.Q<Button>("BtnExit");
+
+        // Asignamos las funciones a los eventos Click
+        _playButton.clicked += OnPlayClicked;
+        _settingsButton.clicked += OnSettingsClicked;
+        _exitButton.clicked += OnExitClicked;
+    }
+
+    private void OnPlayClicked()
+    {
+        Debug.Log("¡BWAAAH! Iniciando juego...");
+        // SceneManager.LoadScene("GameScene");
+    }
+
+    private void OnSettingsClicked()
+    {
+        Debug.Log("Abriendo ajustes...");
+        // Aquí podrías activar un panel superpuesto
+    }
+
+    private void OnExitClicked()
+    {
+        Debug.Log("Saliendo...");
+        Application.Quit();
+    }
+}