chore(PepLib.Core): remove unused using directives and clean up formatting

Remove unnecessary System, System.Collections.Generic, System.IO, and
System.Linq using directives that were flagged by IDE analyzers. Also
includes minor whitespace and code style normalization.

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

PepLib.Core/AngleConverter.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public static class AngleConverter
     {

PepLib.Core/Box.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace PepLib
+namespace PepLib
 {
     public class Box
     {

PepLib.Core/Data/Drawing.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Data/NestDetail.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Data/NestDrawing.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Data/NestHeader.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Data/PlateDetail.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Data/PlateHeader.cs

@@ -1,7 +1,6 @@
 namespace PepLib.Data
 {
     using System;
-    using System.Collections.Generic;
     using System.ComponentModel.DataAnnotations;
     using System.ComponentModel.DataAnnotations.Schema;
 

PepLib.Core/Drawing.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using PepLib.Codes;
+using PepLib.Codes;
 using PepLib.IO;
 
 namespace PepLib

PepLib.Core/DrawingInfo.cs

@@ -1,6 +1,3 @@
-using System;
-using System.IO;
-using System.Text;
 using PepLib.IO;
 
 namespace PepLib

PepLib.Core/Generic.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace PepLib
+namespace PepLib
 {
     public static class Generic
     {

PepLib.Core/IO/DrawingInfoReader.cs

@@ -1,6 +1,4 @@
-using System;
-using System.IO;
-using System.Text;
+using System.Text;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/DrawingReader.cs

@@ -1,6 +1,4 @@
-using System;
 using System.Diagnostics;
-using System.IO;
 using System.IO.Compression;
 using System.Text.RegularExpressions;
 

PepLib.Core/IO/LoopReader.cs

@@ -1,6 +1,4 @@
-using System;
-using System.IO;
-using PepLib.Codes;
+using PepLib.Codes;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/MaterialDataReader.cs

@@ -1,6 +1,4 @@
-using System.Collections.Generic;
-using System.IO;
-using System.Text;
+using System.Text;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/NestInfoReader.cs

@@ -1,6 +1,4 @@
-using System;
-using System.IO;
-using System.Text;
+using System.Text;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/NestReader.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
 using System.IO.Compression;
 using System.Text;
 using System.Text.RegularExpressions;

PepLib.Core/IO/PlateReader.cs

@@ -1,5 +1,4 @@
-using System.IO;
-using PepLib.Codes;
+using PepLib.Codes;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/ProgramReader.cs

@@ -1,7 +1,5 @@
-using System.Collections.Generic;
-using System.IO;
+using PepLib.Codes;
 using System.Text;
-using PepLib.Codes;
 
 namespace PepLib.IO
 {

PepLib.Core/IO/ReportReader.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Diagnostics;
-using System.IO;
+using System.Diagnostics;
 
 namespace PepLib.IO
 {

PepLib.Core/IniConfig.cs

@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.IO;
-
-namespace PepLib
+namespace PepLib
 {
     public class IniConfig
     {

PepLib.Core/Loop.cs

@@ -1,5 +1,4 @@
-using System;
-using PepLib.Codes;
+using PepLib.Codes;
 
 namespace PepLib
 {

PepLib.Core/MathHelper.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public static class MathHelper
     {

PepLib.Core/Nest.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using PepLib.Codes;
+using PepLib.Codes;
 using PepLib.IO;
 
 namespace PepLib

PepLib.Core/NestDrawing.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace PepLib
+namespace PepLib
 {
     public class NestDrawing
     {

PepLib.Core/NestIndex.cs

@@ -1,7 +1,5 @@
-using System.Collections.Generic;
-using System.IO;
+using PepLib.IO;
 using System.Text;
-using PepLib.IO;
 
 namespace PepLib
 {

PepLib.Core/NestInfo.cs

@@ -1,6 +1,4 @@
-using System;
-using System.IO;
-using PepLib.IO;
+using PepLib.IO;
 
 namespace PepLib
 {

PepLib.Core/Node.cs

@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.IO;
-
-namespace PepLib
+namespace PepLib
 {
     public class Node
     {

PepLib.Core/Part.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public class Part : IMovable
     {

PepLib.Core/PartListExtensions.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace PepLib
+namespace PepLib
 {
     public static class PartListExtensions
     {

PepLib.Core/Plate.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace PepLib
+namespace PepLib
 {
     public class Plate : IMovable
     {

PepLib.Core/PlateListExtensions.cs

@@ -1,6 +1,4 @@
-using System.Collections.Generic;
-
-namespace PepLib
+namespace PepLib
 {
     public static class PlateListExtensions
     {

PepLib.Core/Program.cs

@@ -1,8 +1,5 @@
-using System.Collections.Generic;
-using System.IO;
-using PepLib.Codes;
+using PepLib.Codes;
 using PepLib.IO;
-using System;
 
 namespace PepLib
 {

PepLib.Core/Report.Drawing.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public partial class Report
     {

PepLib.Core/Report.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using PepLib.IO;
+using PepLib.IO;
 
 namespace PepLib
 {

PepLib.Core/Tolerance.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public static class Tolerance
     {

PepLib.Core/Util.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Diagnostics;
-using System.IO;
+using System.Diagnostics;
 
 namespace PepLib
 {

PepLib.Core/Vector.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace PepLib
+namespace PepLib
 {
     public struct Vector
     {

PepLib.Core/ZipHelper.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-using System.IO;
 using System.IO.Compression;
 using System.Text.RegularExpressions;