feat: add outgoing messages to client

Client/Domain/Enums/OutgoingMessageTypeEnum.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Enums
+{
+    public enum OutgoingMessageTypeEnum
+    {
+        Invalidate,
+        Move,
+        AcquireTarget,
+        Attack,
+        Pickup,
+        UseSkill,
+        UseItem,
+        ToggleSoulshot,
+        Sit,
+        Stand
+    }
+}