refactor(PepLib.Core): reorganize files into logical folder structure

Move 38 files from root directory into organized subfolders:
- Enums/ (7 files): StatusType, ApplicationType, DrawingType, etc.
- Geometry/ (5 files): Vector, Box, Size, Spacing, Node
- Models/ (15 files): Nest, Plate, Part, Program, Report, etc.
- Utilities/ (7 files): MathHelper, Tolerance, ZipHelper, etc.
- Extensions/ (2 files): PartListExtensions, PlateListExtensions
- Interfaces/ (1 file): IMovable

Update namespaces to follow folder hierarchy (e.g., PepLib.Models).
Add GlobalUsings.cs for internal backward compatibility.
Update Codes/ and IO/ files with new using statements.
Update PepApi.Core consumers to reference new namespaces.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

PepLib.Core/Utilities/ZipHelper.cs

@@ -0,0 +1,81 @@
+using System.IO.Compression;
+using System.Text.RegularExpressions;
+
+namespace PepLib.Utilities
+{
+    public static class ZipHelper
+    {
+        /// <summary>
+        /// Returns the files that match the specified pattern.
+        /// </summary>
+        /// <param name="file">Input zip file.</param>
+        /// <param name="pattern">Pattern to match.</param>
+        /// <param name="names">Names of the files that match the pattern.</param>
+        /// <param name="streams">Data of the files that match the pattern.</param>
+        /// <returns></returns>
+        public static int ExtractByPattern(string file, string pattern, out string[] names, out Stream[] streams)
+        {
+            var nameList = new List<string>();
+            var streamList = new List<Stream>();
+
+            using (var fileStream = new FileStream(file, FileMode.Open, FileAccess.Read))
+            using (var zip = new ZipArchive(fileStream, ZipArchiveMode.Read))
+            {
+                foreach (var entry in zip.Entries)
+                {
+                    if (!Regex.IsMatch(entry.FullName, pattern))
+                        continue;
+
+                    nameList.Add(entry.FullName);
+
+                    var memstream = new MemoryStream();
+                    using var entryStream = entry.Open();
+                    entryStream.CopyTo(memstream);
+                    memstream.Seek(0, SeekOrigin.Begin);
+                    streamList.Add(memstream);
+                }
+            }
+
+            names = nameList.ToArray();
+            streams = streamList.ToArray();
+
+            return streams.Length;
+        }
+
+        /// <summary>
+        /// Returns the first file found that matches the specified file extension.
+        /// </summary>
+        /// <param name="file">Input zip file.</param>
+        /// <param name="extension">Extension to match.</param>
+        /// <param name="name">The name of the file that matches the file extension.</param>
+        /// <param name="stream">The data of the file that matches the file extension.</param>
+        /// <returns></returns>
+        public static bool ExtractByExtension(string file, string extension, out string name, out Stream stream)
+        {
+            using (var fileStream = new FileStream(file, FileMode.Open, FileAccess.Read))
+            using (var zip = new ZipArchive(fileStream, ZipArchiveMode.Read))
+            {
+                foreach (var entry in zip.Entries)
+                {
+                    if (Path.GetExtension(entry.FullName) != extension)
+                        continue;
+
+                    var memstream = new MemoryStream();
+                    using var entryStream = entry.Open();
+                    entryStream.CopyTo(memstream);
+                    memstream.Seek(0, SeekOrigin.Begin);
+
+                    stream = memstream;
+                    name = entry.FullName;
+
+                    return true;
+                }
+            }
+
+            stream = null;
+            name = null;
+
+            return false;
+        }
+    }
+}