Library with Author

Step-by-Step Enhancements

1. Define the Author Case Class: Add a case class to represent an author with attributes like name and nationality.

2. Update the Book Case Class: Modify the Book case class to include an Author.

3. Create a Shopping Basket Class: Define a class to manage the shopping basket, including adding books and calculating the total cost.

4. Update the Library Management System: Update the main application to include the new Author case class and the shopping basket functionality.