Added Source Chapter and Source Page entities.

MangaReader.Core/Data/SourceChapter.cs

@@ -0,0 +1,20 @@
+namespace MangaReader.Core.Data;
+
+public class SourceChapter
+{
+    public int SourceChapterId { get; set; }
+
+    public int MangaSourceId { get; set; }
+    public required MangaSource MangaSource { get; set; }
+
+    public int? ScanlationGroupId { get; set; }
+    public ScanlationGroup? ScanlationGroup { get; set; }
+
+    public required float ChapterNumber { get; set; }
+    public int? VolumeNumber { get; set; }
+    public string? Title { get; set; }
+
+    public required string Url { get; set; }
+
+    public ICollection<SourcePage> Pages { get; set; } = [];
+}