feat: add event bus

Client/Domain/Events/EventHandlerInterface.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Events
+{
+    public interface EventHandlerInterface
+    {
+    }
+
+    public interface EventHandlerInterface<T> : EventHandlerInterface where T : EventInterface
+    {
+        void Handle(T @event);
+    }
+}