Add Resume/Exit buttons to pause menu, handle logic for returning to main menu and starting a new game

Zennysoft.Game.Ma/src/game/IGame.cs

@@ -4,6 +4,7 @@ namespace Zennysoft.Game.Ma;
 using Chickensoft.AutoInject;
 using Chickensoft.GodotNodeInterfaces;
 using Chickensoft.SaveFileBuilder;
+using System;
 using System.Threading.Tasks;
 using Zennysoft.Ma.Adapter;
 
@@ -30,4 +31,6 @@ public interface IGame : IProvide<IGame>, IProvide<IGameRepo>, IProvide<IPlayer>
   public Task Save();
 
   public QuestData QuestData { get; }
+
+  public event Action GameExitRequested;
 }