feat: add event bus

Client/Domain/Events/HeroCreatedEvent.cs

@@ -0,0 +1,19 @@
+using Client.Domain.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Events
+{
+    public class HeroCreatedEvent : EventInterface
+    {
+        public readonly Hero Hero;
+
+        public HeroCreatedEvent(Hero hero)
+        {
+            Hero = hero;
+        }
+    }
+}