feat(Hintergrund): Erstellen, um den Hintergrund von Anmerkungen mit der Eigenschaft MarginRatio zu konfigurieren.

- verschiebt Anmerkungen nach

EnvelopeGenerator.Web/Models/Annotation/AnnotationParams.cs

@@ -0,0 +1,64 @@
+using System.Text.Json.Serialization;
+
+namespace EnvelopeGenerator.Web.Models.Annotation;
+
+public class AnnotationParams
+{
+    public AnnotationParams()
+    {
+        _annotationDictionaryInitor = new(() => _annots.ToDictionary(a => a.Name.ToLower(), a => a));
+    }
+
+    public Background? Background { get; init; }
+
+    [JsonIgnore]
+    public Annotation? DefaultAnnotation { get; init; }
+
+    private readonly List<Annotation> _annots = new List<Annotation>();
+
+    public Annotation this[string name] => _annots.First(a => a.Name == name);
+
+    public bool TryGet(string name, out Annotation annotation)
+    {
+#pragma warning disable CS8601 // Possible null reference assignment.
+        annotation = _annots.FirstOrDefault(a => a.Name == name);
+#pragma warning restore CS8601 // Possible null reference assignment.
+        return annotation is not null;
+    }
+
+    public required IEnumerable<Annotation> Annotations
+    {
+        get => _annots;
+        init
+        {
+            _annots = value.ToList();
+
+            if (DefaultAnnotation is not null)
+                foreach (var annot in _annots)
+                    annot.Default = DefaultAnnotation;
+
+            foreach (var annot in _annots)
+            {
+                #region set bound annotations
+                // horizontal
+                if (annot.HorBoundAnnotName is string horBoundAnnotName)
+                    if (TryGet(horBoundAnnotName, out var horBoundAnnot))
+                        annot.HorBoundAnnot = horBoundAnnot;
+                    else
+                        throw new InvalidOperationException($"{horBoundAnnotName} added as bound anotation. However, it is not defined.");
+
+                // vertical
+                if (annot.VerBoundAnnotName is string verBoundAnnotName)
+                    if (TryGet(verBoundAnnotName, out var verBoundAnnot))
+                        annot.VerBoundAnnot = verBoundAnnot;
+                    else
+                        throw new InvalidOperationException($"{verBoundAnnotName} added as bound anotation. However, it is not defined.");
+                #endregion
+            }
+        }
+    }
+
+    private readonly Lazy<Dictionary<string, Annotation>> _annotationDictionaryInitor;
+
+    public Dictionary<string, Annotation> AnnotationDictionary => _annotationDictionaryInitor.Value;
+}