misc: Move configuration management to the Ryujinx project (#2269)

* Decouple configuration from Ryujinx.HLE and Ryujinx.Input

* Move Configuration to the Ryujinx project

Ryujinx/Configuration/System/Region.cs

@@ -0,0 +1,13 @@
+namespace Ryujinx.Configuration.System
+{
+    public enum Region
+    {
+        Japan,
+        USA,
+        Europe,
+        Australia,
+        China,
+        Korea,
+        Taiwan
+    }
+}