Start Metal Backend

Revert build yml changes

src/Ryujinx.Graphics.Metal/Window.cs

@@ -0,0 +1,53 @@
+using Ryujinx.Graphics.GAL;
+using System;
+using SharpMetal;
+
+namespace Ryujinx.Graphics.Metal
+{
+    public class Window : IWindow, IDisposable
+    {
+
+        public Window()
+        {
+            /*var viewport = new MTLViewport
+            {
+
+            };*/
+        }
+
+        public void Present(ITexture texture, ImageCrop crop, Action swapBuffersCallback)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetSize(int width, int height)
+        {
+            // Not needed as we can get the size from the surface.
+        }
+
+        public void ChangeVSyncMode(bool vsyncEnabled)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetAntiAliasing(AntiAliasing antialiasing)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetScalingFilter(ScalingFilter type)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetScalingFilterLevel(float level)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void Dispose()
+        {
+
+        }
+    }
+}