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/Footer.cs

@@ -0,0 +1,36 @@
+namespace Adaptation.FileHandlers.pdsf;
+
+#nullable enable
+
+public class Footer
+{
+
+    public Footer(string line, string radialVariationThickness, string slot)
+    {
+        Line = line;
+        RadialVariationThickness = radialVariationThickness;
+        Slot = slot;
+    }
+
+    public string Line { get; }
+    public string RadialVariationThickness { get; }
+    public string Slot { get; }
+
+    internal static Footer? Get(Constant constant, string text, int[] i)
+    {
+        Footer? result;
+        _ = Run.GetToEOL(text, i);
+        _ = Run.GetToEOL(text, i);
+        string line = Run.GetToEOL(text, i);
+        i[0] = Run.ScanPast(text, i, constant.Thickness);
+        string radialVariationThickness = Run.GetToEOL(text, i);
+        _ = Run.GetToEOL(text, i);
+        i[0] = Run.ScanPast(text, i, constant.Slot);
+        string slot = Run.GetBefore(text, i, constant.Semicolon);
+        result = new(line,
+                     radialVariationThickness,
+                     slot);
+        return result;
+    }
+
+}