misc: Move the rest of Ryujinx.UI.Common into other parts of the project.

src/Ryujinx/Utilities/Configuration/System/Region.cs

@@ -0,0 +1,17 @@
+using Ryujinx.Common.Utilities;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.Ava.Utilities.Configuration.System
+{
+    [JsonConverter(typeof(TypedStringEnumConverter<Region>))]
+    public enum Region
+    {
+        Japan,
+        USA,
+        Europe,
+        Australia,
+        China,
+        Korea,
+        Taiwan,
+    }
+}