Custom configuration for each game (#632)

![image](https://github.com/user-attachments/assets/5dd139b4-2004-4c13-85d1-fc3378382adf)

![image](https://github.com/user-attachments/assets/9bcb8524-a403-428f-9f98-e8c03c75f079)

Now you can make a separate configuration (independent file) for each
game. All emulator settings are available except for some UI functionality ones. 
The configuration file can be changed and deleted from a separate menu. The
user configuration menu is available through the context menu on a given application.

---------

Co-authored-by: Evan Husted <greem@greemdev.net>

src/Ryujinx/AppHost.cs

@@ -1113,6 +1113,13 @@ namespace Ryujinx.Ava
             });
 
             (RendererHost.EmbeddedWindow as EmbeddedWindowOpenGL)?.MakeCurrent(true);
+            
+            // Reload settings when the game is turned off
+            // (resets custom settings if there were any)
+            Program.ReloadConfig();
+
+            // Reload application list (changes the status of the user setting if it was added or removed during the game)
+            Dispatcher.UIThread.Post(() => RyujinxApp.MainWindow.LoadApplications());
         }
 
         public void InitStatus()