infra: Make Avalonia the default UI (#6375)

* misc: Move Ryujinx project to Ryujinx.Gtk3

This breaks release CI for now but that's fine.

Signed-off-by: Mary Guillemard <mary@mary.zone>

* misc: Move Ryujinx.Ava project to Ryujinx

This breaks CI for now, but it's fine.

Signed-off-by: Mary Guillemard <mary@mary.zone>

* infra: Make Avalonia the default UI

Should fix CI after the previous changes.

GTK3 isn't build by the release job anymore, only by PR CI.

This also ensure that the test-ava update package is still generated to
allow update from the old testing channel.

Signed-off-by: Mary Guillemard <mary@mary.zone>

* Fix missing copy in create_app_bundle.sh

Signed-off-by: Mary Guillemard <mary@mary.zone>

* Fix syntax error

Signed-off-by: Mary Guillemard <mary@mary.zone>

---------

Signed-off-by: Mary Guillemard <mary@mary.zone>

src/Ryujinx/UI/Views/User/UserFirmwareAvatarSelectorView.axaml.cs

@@ -0,0 +1,89 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using FluentAvalonia.UI.Controls;
+using FluentAvalonia.UI.Navigation;
+using Ryujinx.Ava.UI.Controls;
+using Ryujinx.Ava.UI.Models;
+using Ryujinx.Ava.UI.ViewModels;
+using Ryujinx.HLE.FileSystem;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats.Png;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using System.IO;
+using Image = SixLabors.ImageSharp.Image;
+
+namespace Ryujinx.Ava.UI.Views.User
+{
+    public partial class UserFirmwareAvatarSelectorView : UserControl
+    {
+        private NavigationDialogHost _parent;
+        private TempProfile _profile;
+
+        public UserFirmwareAvatarSelectorView(ContentManager contentManager)
+        {
+            ContentManager = contentManager;
+
+            DataContext = ViewModel;
+
+            InitializeComponent();
+        }
+
+        public UserFirmwareAvatarSelectorView()
+        {
+            InitializeComponent();
+
+            AddHandler(Frame.NavigatedToEvent, (s, e) =>
+            {
+                NavigatedTo(e);
+            }, RoutingStrategies.Direct);
+        }
+
+        private void NavigatedTo(NavigationEventArgs arg)
+        {
+            if (Program.PreviewerDetached)
+            {
+                if (arg.NavigationMode == NavigationMode.New)
+                {
+                    (_parent, _profile) = ((NavigationDialogHost, TempProfile))arg.Parameter;
+                    ContentManager = _parent.ContentManager;
+                    if (Program.PreviewerDetached)
+                    {
+                        ViewModel = new UserFirmwareAvatarSelectorViewModel();
+                    }
+
+                    DataContext = ViewModel;
+                }
+            }
+        }
+
+        public ContentManager ContentManager { get; private set; }
+
+        internal UserFirmwareAvatarSelectorViewModel ViewModel { get; set; }
+
+        private void GoBack(object sender, RoutedEventArgs e)
+        {
+            _parent.GoBack();
+        }
+
+        private void ChooseButton_OnClick(object sender, RoutedEventArgs e)
+        {
+            if (ViewModel.SelectedImage != null)
+            {
+                MemoryStream streamJpg = new();
+                Image avatarImage = Image.Load(ViewModel.SelectedImage, new PngDecoder());
+
+                avatarImage.Mutate(x => x.BackgroundColor(new Rgba32(
+                    ViewModel.BackgroundColor.R,
+                    ViewModel.BackgroundColor.G,
+                    ViewModel.BackgroundColor.B,
+                    ViewModel.BackgroundColor.A)));
+                avatarImage.SaveAsJpeg(streamJpg);
+
+                _profile.Image = streamJpg.ToArray();
+
+                _parent.GoBack();
+            }
+        }
+    }
+}