Switch to NetMQ for inter-process debugging

UIX/Microsoft/Iris/Debug/ZmqDebuggerClient.cs

@@ -0,0 +1,56 @@
+using Microsoft.Iris.Debug.Data;
+using NetMQ;
+using NetMQ.Sockets;
+using System;
+using System.Text;
+
+namespace Microsoft.Iris.Debug;
+
+public class ZmqDebuggerClient : IDebuggerClient, IDisposable
+{
+    private readonly SubscriberSocket _subSocket;
+
+    public event EventHandler<InterpreterEntry> InterpreterStep;
+    public event Action<string> DispatcherStep;
+
+    public ZmqDebuggerClient(string connectionUri)
+    {
+        _subSocket = new();
+        _subSocket.Connect(connectionUri);
+        _subSocket.SubscribeToAnyTopic();
+
+        System.Threading.Thread th = new(MessageRecieveLoop);
+        th.Start();
+    }
+
+    public void Dispose() => _subSocket.Dispose();
+
+    private void MessageRecieveLoop()
+    {
+        while (!_subSocket.IsDisposed)
+        {
+            var type = RecieveDebuggerMessage(_subSocket, out var bytes);
+
+            switch (type)
+            {
+                case DebuggerMessageType.InterpreterOpCode:
+                    string entry = Encoding.Unicode.GetString(bytes);
+                    InterpreterStep?.Invoke(this, null);
+                    break;
+
+                case DebuggerMessageType.DispatcherStep:
+                    string message = Encoding.Unicode.GetString(bytes);
+                    DispatcherStep?.Invoke(message);
+                    break;
+            }
+        }
+    }
+
+    private DebuggerMessageType RecieveDebuggerMessage(SubscriberSocket socket, out byte[] bytes)
+    {
+        var frames = socket.ReceiveMultipartBytes(2);
+
+        bytes = frames[1];
+        return (DebuggerMessageType)BitConverter.ToInt32(frames[0], 0);
+    }
+}