Move solution and projects to src

src/Ryujinx.Graphics.Nvdec.Vp9/InternalErrorException.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Ryujinx.Graphics.Nvdec.Vp9
+{
+    class InternalErrorException : Exception
+    {
+        public InternalErrorException(string message) : base(message)
+        {
+        }
+
+        public InternalErrorException(string message, Exception innerException) : base(message, innerException)
+        {
+        }
+    }
+}