feat(PDFBurnerParams): add IndexOfAnnot-dictionary

EnvelopeGenerator.Application/Common/Configurations/PDFBurnerParams.cs

@@ -1,5 +1,6 @@
-using System.Drawing;
+using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
+using System.Drawing;
 
 namespace EnvelopeGenerator.Application.Common.Configurations;
 
@@ -45,4 +46,16 @@ public class PDFBurnerParams
     /// </summary>
     [SuppressMessage("Interoperability", "CA1416:Validate platform compatibility", Justification = "<Pending>")]
     public FontStyle FontStyle { get; set; } = FontStyle.Italic;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public Dictionary<string, int> IndexOfAnnot { get; init; } = new()
+    {
+        { string.Empty, 0 },
+        { "seal", 0 },
+        { "position", 1 },
+        { "city", 2 },
+        { "date", 3 }
+    };
 }