feat: add outgoing messages to client

Client/Domain/Parsers/OutgoingMessageBuilderInterface.cs

@@ -0,0 +1,14 @@
+using Client.Domain.DTO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Parsers
+{
+    public interface OutgoingMessageBuilderInterface
+    {
+        string Build<T>(OutgoingMessage<T> message);
+    }
+}