Refactor QS408M and PDSF File Handlers

- Updated Detail class to include JsonSourceGenerationOptions and JsonSerializable attributes for source generation.
- Modified ProcessData class to utilize source generation context for Description deserialization.
- Renamed RowSourceGenerationContext to QS408MRowSourceGenerationContext for clarity.
- Updated Run class to use QS408MRunSourceGenerationContext for serialization.
- Enhanced Description class with source generation attributes.
- Refactored FileRead class to use source generation context for Description deserialization.
- Added new methods in ProcessDataStandardFormat for JSON element array extraction.
- Introduced new PDSF file handler classes: Body, Constant, FileRead, Footer, Header, Row, Run, and Site.
- Implemented logic for parsing and handling PDSF data structures.
- Added unit tests for PDSF processing to ensure functionality.

Adaptation/FileHandlers/pdsf/Site.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+
+namespace Adaptation.FileHandlers.pdsf;
+
+public class Site
+{
+
+    public Site(string position, string thickness)
+    {
+        Position = position;
+        Thickness = thickness;
+    }
+
+    public string Position { get; }
+    public string Thickness { get; }
+
+    internal static ReadOnlyCollection<Site> Get(string text, int[] i)
+    {
+        List<Site> results = new();
+        Site site;
+        string thickness;
+        string position = Body.GetToken(text, i);
+        while (true)
+        {
+            if (string.IsNullOrEmpty(position) || !char.IsDigit(position[0]))
+                break;
+            thickness = Body.GetToken(text, i);
+            site = new(position, thickness);
+            results.Add(site);
+            position = Body.GetToken(text, i);
+        }
+        return results.AsReadOnly();
+    }
+
+}