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/Input/AvaloniaMouse.cs

@@ -0,0 +1,87 @@
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Input;
+using System;
+using System.Drawing;
+using System.Numerics;
+
+namespace Ryujinx.Ava.Input
+{
+    internal class AvaloniaMouse : IMouse
+    {
+        private AvaloniaMouseDriver _driver;
+
+        public string Id => "0";
+        public string Name => "AvaloniaMouse";
+
+        public bool IsConnected => true;
+        public GamepadFeaturesFlag Features => throw new NotImplementedException();
+        public bool[] Buttons => _driver.PressedButtons;
+
+        public AvaloniaMouse(AvaloniaMouseDriver driver)
+        {
+            _driver = driver;
+        }
+
+        public Size ClientSize => _driver.GetClientSize();
+
+        public Vector2 GetPosition()
+        {
+            return _driver.CurrentPosition;
+        }
+
+        public Vector2 GetScroll()
+        {
+            return _driver.Scroll;
+        }
+
+        public GamepadStateSnapshot GetMappedStateSnapshot()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Vector3 GetMotionData(MotionInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public GamepadStateSnapshot GetStateSnapshot()
+        {
+            throw new NotImplementedException();
+        }
+
+        public (float, float) GetStick(StickInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool IsButtonPressed(MouseButton button)
+        {
+            return _driver.IsButtonPressed(button);
+        }
+
+        public bool IsPressed(GamepadButtonInputId inputId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Rumble(float lowFrequency, float highFrequency, uint durationMs)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetConfiguration(InputConfig configuration)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetTriggerThreshold(float triggerThreshold)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Dispose()
+        {
+            _driver = null;
+        }
+    }
+}