UI: Show Total Time Played at the bottom of the UI in the status bar next to game total.

Does not show up in-game, and is recalculated every time the game list is reloaded.

src/Ryujinx/UI/Windows/MainWindow.axaml.cs

@@ -717,6 +717,8 @@ namespace Ryujinx.Ava.UI.Windows
 
                     ShowNewContentAddedDialog(dlcLoaded, dlcRemoved, updatesLoaded, updatesRemoved);
                 }
+                
+                Executor.ExecuteBackgroundAsync(ApplicationLibrary.RefreshTotalTimePlayedAsync);
 
                 _isLoading = false;
             })