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

Zennysoft.Game.Ma.Implementation/Game/state/GameState.Input.cs

@@ -8,10 +8,14 @@ public partial class GameState
 
     public readonly record struct LoadGame;
 
+    public readonly record struct ExitGame;
+
     public readonly record struct LoadNextFloor;
 
     public readonly record struct InventoryButtonPressed;
 
+    public readonly record struct InteractButtonPressed;
+
     public readonly record struct PauseButtonPressed;
 
     public readonly record struct DebugButtonPressed;