Restrcutured the database, and updated pipeline to include cover art.

MangaReader.Core/Data/SourceTitle.cs

@@ -0,0 +1,15 @@
+using MangaReader.Core.Common;
+
+namespace MangaReader.Core.Data;
+
+public class SourceTitle
+{
+    public int SourceTitleId { get; set; }
+
+    public int MangaSourceId { get; set; }
+    public required MangaSource MangaSource { get; set; }
+
+    public required string Name { get; set; }
+    public required Language Language { get; set; }
+    public bool IsPrimary { get; set; }
+}