Debugger UI skeleton.

src/Xenia.Debug/Thread.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xenia.Debug.Utilities;
+
+namespace Xenia.Debug {
+  public class ThreadContext {
+  }
+
+  public class Thread : Changeable {
+  }
+}