feat: add npc info (level and aggro radius)

Client/Domain/Helpers/NpcInfoHelperInterface.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Helpers
+{
+    public interface NpcInfoHelperInterface
+    {
+        uint GetLevel(uint id);
+        uint GetAggroRadius(uint id);
+    }
+}