feat(AnnotationParams): Hinzufügen der Eigenschaft AnnotationDictionary, um Anmerkungen in Form eines Wörterbuchs zu speichern.

EnvelopeGenerator.Web/Models/AnnotationParams.cs

@@ -48,6 +48,10 @@ public class AnnotationParams
                         throw new InvalidOperationException($"{verBoundAnnotName} added as bound anotation. However, it is not defined.");
                 #endregion
             }
+
+            AnnotationDictionary = _annots.ToDictionary(a => a.Name.ToLower(), a => a);
         }
     }
+
+    public Dictionary<string, Annotation> AnnotationDictionary { get; private init; } = new();
 }