Added Source Chapter and Source Page entities.

MangaReader.Core/Pipeline/MangaMetadataPipelineRequest.cs

@@ -0,0 +1,11 @@
+using MangaReader.Core.Metadata;
+
+namespace MangaReader.Core.Pipeline;
+
+public class MangaMetadataPipelineRequest
+{
+    public int? MangaId { get; init; }
+    public required string SourceName { get; init; }
+    public required string SourceUrl { get; init; }
+    public required SourceManga SourceManga { get; init; }
+}