Move solution and projects to src

src/Ryujinx.Common/Configuration/TitleUpdateMetadataJsonSerializerContext.cs

@@ -0,0 +1,10 @@
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.Common.Configuration
+{
+    [JsonSourceGenerationOptions(WriteIndented = true)]
+    [JsonSerializable(typeof(TitleUpdateMetadata))]
+    public partial class TitleUpdateMetadataJsonSerializerContext : JsonSerializerContext
+    {
+    }
+}