Rough version of Saving Series, Volumes, and MangaFiles to the DB. Relies on Cascaded delete rather than manually handling updating of file changes.

API/Entities/MangaFile.cs

@@ -0,0 +1,14 @@
+namespace API.Entities
+{
+    public class MangaFile
+    {
+        public int Id { get; set; }
+        public string FilePath { get; set; }
+        //public string FileExtension { get; set; }
+        
+        // Relationship Mapping
+        public Volume Volume { get; set; }
+        public int VolumeId { get; set; }
+        
+    }
+}