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/UI/Controls/ApplicationContextMenu.axaml.cs

@@ -386,13 +386,26 @@ namespace Ryujinx.Ava.UI.Controls
                     viewModel.SelectedApplication.Icon
                 );
         }
-        
+
+        public async void EditGameConfiguration_Click(object sender, RoutedEventArgs args)
+        {
+            if (sender is MenuItem { DataContext: MainWindowViewModel { SelectedApplication: not null } viewModel })
+            {
+                await new GameSpecificSettingsWindow(viewModel).ShowDialog((Window)viewModel.TopLevel);
+
+                //just checking for file presence
+                viewModel.SelectedApplication.HasIndependentConfiguration = File.Exists(Program.GetDirGameUserConfig(viewModel.SelectedApplication.IdString,false,false));
+
+                viewModel.RefreshView();
+            }
+        }
+
         public async void OpenApplicationCompatibility_Click(object sender, RoutedEventArgs args)
         {
             if (sender is MenuItem { DataContext: MainWindowViewModel { SelectedApplication: not null } viewModel })
                 await CompatibilityList.Show(viewModel.SelectedApplication.IdString);
         }
-        
+               
         public async void OpenApplicationData_Click(object sender, RoutedEventArgs args)
         {
             if (sender is MenuItem { DataContext: MainWindowViewModel { SelectedApplication: not null } viewModel })