Move solution and projects to src

src/Ryujinx.Common/Configuration/GraphicsBackend.cs

@@ -0,0 +1,12 @@
+using Ryujinx.Common.Utilities;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.Common.Configuration
+{
+    [JsonConverter(typeof(TypedStringEnumConverter<GraphicsBackend>))]
+    public enum GraphicsBackend
+    {
+        Vulkan,
+        OpenGl
+    }
+}