feat: add CuttingResult struct

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

OpenNest.Core/CNC/CuttingStrategy/CuttingResult.cs

@@ -0,0 +1,11 @@
+using OpenNest.CNC;
+using OpenNest.Geometry;
+
+namespace OpenNest.CNC.CuttingStrategy
+{
+    public readonly struct CuttingResult
+    {
+        public Program Program { get; init; }
+        public Vector LastCutPoint { get; init; }
+    }
+}