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.Gtk3/Input/GTK3/GTK3KeyboardDriver.cs

@@ -0,0 +1,94 @@
+using Gdk;
+using Gtk;
+using System;
+using System.Collections.Generic;
+using GtkKey = Gdk.Key;
+
+namespace Ryujinx.Input.GTK3
+{
+    public class GTK3KeyboardDriver : IGamepadDriver
+    {
+        private readonly Widget _widget;
+        private readonly HashSet<GtkKey> _pressedKeys;
+
+        public GTK3KeyboardDriver(Widget widget)
+        {
+            _widget = widget;
+            _pressedKeys = new HashSet<GtkKey>();
+
+            _widget.KeyPressEvent += OnKeyPress;
+            _widget.KeyReleaseEvent += OnKeyRelease;
+        }
+
+        public string DriverName => "GTK3";
+
+        private static readonly string[] _keyboardIdentifers = new string[1] { "0" };
+
+        public ReadOnlySpan<string> GamepadsIds => _keyboardIdentifers;
+
+        public event Action<string> OnGamepadConnected
+        {
+            add { }
+            remove { }
+        }
+
+        public event Action<string> OnGamepadDisconnected
+        {
+            add { }
+            remove { }
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _widget.KeyPressEvent -= OnKeyPress;
+                _widget.KeyReleaseEvent -= OnKeyRelease;
+            }
+        }
+
+        public void Dispose()
+        {
+            GC.SuppressFinalize(this);
+            Dispose(true);
+        }
+
+        [GLib.ConnectBefore]
+        protected void OnKeyPress(object sender, KeyPressEventArgs args)
+        {
+            GtkKey key = (GtkKey)Keyval.ToLower((uint)args.Event.Key);
+
+            _pressedKeys.Add(key);
+        }
+
+        [GLib.ConnectBefore]
+        protected void OnKeyRelease(object sender, KeyReleaseEventArgs args)
+        {
+            GtkKey key = (GtkKey)Keyval.ToLower((uint)args.Event.Key);
+
+            _pressedKeys.Remove(key);
+        }
+
+        internal bool IsPressed(Key key)
+        {
+            if (key == Key.Unbound || key == Key.Unknown)
+            {
+                return false;
+            }
+
+            GtkKey nativeKey = GTK3MappingHelper.ToGtkKey(key);
+
+            return _pressedKeys.Contains(nativeKey);
+        }
+
+        public IGamepad GetGamepad(string id)
+        {
+            if (!_keyboardIdentifers[0].Equals(id))
+            {
+                return null;
+            }
+
+            return new GTK3Keyboard(this, _keyboardIdentifers[0], "All keyboards");
+        }
+    }
+}