feat: add pathfinding

Client/Domain/Service/PathfinderInterface.cs

@@ -0,0 +1,15 @@
+using Client.Domain.DTO;
+using Client.Domain.ValueObjects;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Domain.Service
+{
+    public interface PathfinderInterface
+    {
+        public List<PathSegment> FindPath(Vector3 start, Vector3 end);
+    }
+}