Initial efcore migration and updates to make sure upserting novels (mostly) works. still need to do chapter handling

DBConnection/Repositories/Interfaces/IAuthorRepository.cs

@@ -0,0 +1,8 @@
+using DBConnection.Models;
+
+namespace DBConnection.Repositories.Interfaces;
+
+public interface IAuthorRepository : IRepository<Author>
+{
+    
+}