Added contributor classes for manga. Implemented MangaDex search.

MangaReader.Core/Search/MangaDex/MangaDexSearchResultDataRelationship.cs

@@ -0,0 +1,8 @@
+namespace MangaReader.Core.Search.MangaDex;
+
+public class MangaDexSearchResultDataRelationship
+{
+    public required Guid Id { get; set; }
+    public required string Type { get; set; }
+    public Dictionary<string, object> Attributes { get; set; } = [];
+}