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/AngleConverter.cs

@@ -0,0 +1,15 @@
+namespace PepLib.Utilities
+{
+    public static class AngleConverter
+    {
+        public static double ToDegrees(double radians)
+        {
+            return 180.0 / Math.PI * radians;
+        }
+
+        public static double ToRadians(double degrees)
+        {
+            return Math.PI / 180.0 * degrees;
+        }
+    }
+}

PepLib.Core/Utilities/Generic.cs

@@ -0,0 +1,12 @@
+namespace PepLib.Utilities
+{
+    public static class Generic
+    {
+        public static void Swap<T>(ref T a, ref T b)
+        {
+            T c = a;
+            a = b;
+            b = c;
+        }
+    }
+}

PepLib.Core/Utilities/IniConfig.cs

@@ -0,0 +1,100 @@
+using PepLib.Geometry;
+
+namespace PepLib.Utilities
+{
+    public class IniConfig
+    {
+        public List<Node> Nodes;
+
+        public IniConfig()
+        {
+            Nodes = new List<Node>();
+        }
+
+        private static int LeadingWhitespaceCount(string s)
+        {
+            for (int i = 0; i < s.Length; ++i)
+                if (s[i] != ' ') return i;
+
+            return 0;
+        }
+
+        public Node FindNode(string path)
+        {
+            return FindNode(path, Nodes);
+        }
+
+        private Node FindNode(string path, List<Node> nodes)
+        {
+            var a = path.Split('/');
+
+            var b = nodes.FirstOrDefault(node =>
+            {
+                if (node is KeyNode)
+                {
+                    var c = node as KeyNode;
+                    return c.Name.ToUpper() == a[0].ToUpper();
+                }
+                else
+                {
+                    return node.Value == a[0].Trim();
+                }
+            });
+
+            string path2 = string.Empty;
+
+            for (int i = 1; i < a.Length; ++i)
+                path2 += a[i] + '/';
+
+            if (b == null || a.Length == 1)
+                return b;
+            else
+                return FindNode(path2.TrimEnd('/'), b.Children);
+        }
+
+        public static IniConfig Load(string file)
+        {
+            var doc = new IniConfig();
+            var reader = new StreamReader(file);
+
+            Node currentNode = null;
+            string line;
+
+            while ((line = reader.ReadLine()) != null)
+            {
+                int spaces = LeadingWhitespaceCount(line) / 2;
+                var node = new Node();
+                node.Value = line.Trim();
+
+                var keyNode = KeyNode.Parse(node);
+
+                if (keyNode != null)
+                    node = keyNode;
+
+                int currentdepth = currentNode != null ? currentNode.Level : 0;
+
+                if (spaces == 0)
+                    doc.Nodes.Add(node);
+                else if (spaces == currentdepth)
+                    currentNode.Parent.AddChild(node);
+                else if (spaces > currentdepth)
+                    currentNode.AddChild(node);
+                else if (spaces < currentdepth)
+                {
+                    var n = currentNode.Parent;
+
+                    while (spaces < n.Level)
+                        n = n.Parent;
+
+                    n.Parent.AddChild(node);
+                }
+
+                currentNode = node;
+            }
+
+            reader.Close();
+
+            return doc;
+        }
+    }
+}

PepLib.Core/Utilities/MathHelper.cs

@@ -0,0 +1,53 @@
+namespace PepLib.Utilities
+{
+    public static class MathHelper
+    {
+        public const double HalfPI = Math.PI * 0.5;
+        public const double TwoPI = Math.PI * 2.0;
+
+        public static double NormalizeAngleRad(double angle)
+        {
+            double r = angle % TwoPI;
+            return r < 0 ? TwoPI + r : r;
+        }
+
+        public static double NormalizeAngleDeg(double angle)
+        {
+            double r = angle % 360.0;
+            return r < 0 ? 360.0 + r : r;
+        }
+
+        public static bool IsAngleBetween(double angle, double a1, double a2, bool reversed = false)
+        {
+            if (reversed)
+                Generic.Swap(ref a1, ref a2);
+
+            var diff = NormalizeAngleRad(a2 - a1);
+
+            // full circle
+            if (a2.IsEqualTo(a1))
+                return true;
+
+            a1 = NormalizeAngleRad(angle - a1);
+            a2 = NormalizeAngleRad(a2 - angle);
+
+            return diff >= a1 - Tolerance.Epsilon ||
+                   diff >= a2 - Tolerance.Epsilon;
+        }
+
+        public static double RoundDownToNearest(double num, double factor)
+        {
+            return factor == 0 ? num : Math.Floor(num / factor) * factor;
+        }
+
+        public static double RoundUpToNearest(double num, double factor)
+        {
+            return factor == 0 ? num : Math.Ceiling(num / factor) * factor;
+        }
+
+        public static double RoundToNearest(double num, double factor)
+        {
+            return factor == 0 ? num : Math.Round(num / factor) * factor;
+        }
+    }
+}

PepLib.Core/Utilities/Tolerance.cs

@@ -0,0 +1,12 @@
+namespace PepLib.Utilities
+{
+    public static class Tolerance
+    {
+        public const double Epsilon = 0.0001;
+
+        public static bool IsEqualTo(this double a, double b, double tolerance = Epsilon)
+        {
+            return Math.Abs(b - a) <= tolerance;
+        }
+    }
+}

PepLib.Core/Utilities/Util.cs

@@ -0,0 +1,30 @@
+using System.Diagnostics;
+
+namespace PepLib.Utilities
+{
+    public static class Util
+    {
+        public static string GetNestFileFormat(string filename)
+        {
+            try
+            {
+                var name = Path.GetFileName(filename);
+                var ext = Path.GetExtension(name);
+
+                if (name.LastIndexOf(ext) > 5 && !name.Contains("-"))
+                    name = name.Insert(5, "-");
+
+                if (name.LastIndexOf(ext) > 8 && char.IsLetter(name[8]))
+                    name = name.Remove(8, 1);
+
+                return Path.Combine(Path.GetDirectoryName(filename), name);
+            }
+            catch (SystemException ex)
+            {
+                Debug.WriteLine(ex.Message);
+            }
+
+            return string.Empty;
+        }
+    }
+}

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;
+        }
+    }
+}