Added more UI logic. Added a manga pipeline test.

MangaReader.Core/Data/MangaDescription.cs

@@ -0,0 +1,14 @@
+using MangaReader.Core.Common;
+
+namespace MangaReader.Core.Data;
+
+public class MangaDescription
+{
+    public int MangaTitleId { get; set; }
+
+    public int MangaId { get; set; }
+    public required Manga Manga { get; set; }
+
+    public required string Name { get; set; }
+    public required Language Language { get; set; }
+}