feat: add CadImportResult data object for CadImporter

OpenNest.IO/CadImportResult.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using ACadSharp;
+using OpenNest.Bending;
+using OpenNest.Geometry;
+
+namespace OpenNest.IO
+{
+    /// <summary>
+    /// Intermediate result of <see cref="CadImporter.Import"/>. Holds raw loaded
+    /// geometry and detected bends. Callers may mutate <see cref="Entities"/> and
+    /// <see cref="Bends"/> before passing to <see cref="CadImporter.BuildDrawing"/>.
+    /// </summary>
+    public class CadImportResult
+    {
+        /// <summary>
+        /// All entities loaded from the source file, including promoted bend
+        /// source entities. Mutable.
+        /// </summary>
+        public List<Entity> Entities { get; set; } = new List<Entity>();
+
+        /// <summary>
+        /// Bends detected during import. Mutable — callers may add, remove,
+        /// or replace entries before building the drawing.
+        /// </summary>
+        public List<Bend> Bends { get; set; } = new List<Bend>();
+
+        /// <summary>
+        /// Bounding box of <see cref="Entities"/> at import time. May be stale
+        /// if callers mutate <see cref="Entities"/>; recompute if needed.
+        /// </summary>
+        public Box Bounds { get; set; }
+
+        /// <summary>
+        /// Underlying CAD document for callers that need to run additional
+        /// analysis (e.g., MText extraction). May be null for stream imports.
+        /// </summary>
+        public CadDocument Document { get; set; }
+
+        /// <summary>
+        /// Absolute path to the source file.
+        /// </summary>
+        public string SourcePath { get; set; }
+
+        /// <summary>
+        /// Default drawing name (filename without extension, unless overridden).
+        /// </summary>
+        public string Name { get; set; }
+    }
+}