added gamescreen UI and simple start menu

Assets/Darkmatter/Code/Core/Data/Input/InputReaderSO.cs

@@ -71,5 +71,15 @@ namespace Darkmatter.Core
                 OnReloadPerformed?.Invoke();
             }
         }
+
+        public void DisableInput()
+        {
+            action.Player.Disable();
+        }
+
+        public void EnableInput()
+        {
+            action.Player.Enable();
+        }
     }
 }