[FA-5] Adds image support with proper S3 upload and replacement after upload

FictionArchive.Service.NovelService/Models/Images/Image.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Service.NovelService.Models.Novels;
+using FictionArchive.Service.Shared.Models;
+
+namespace FictionArchive.Service.NovelService.Models.Images;
+
+public class Image : BaseEntity<Guid>
+{
+    public string OriginalPath { get; set; }
+    public string? NewPath { get; set; }
+    
+    // Chapter link. Even if an image appears in another chapter, we should rehost it separately.
+    public Chapter? Chapter { get; set; }
+}