Library Service

In this task, you are to enhance a basic library management system in Kotlin by implementing several functions in the LibraryService class. This system allows for adding books to a library and searching them by title, author, or genre.

The LibraryService class already contains skeleton methods that you need to fill in. Additionally, you are provided with two data classes: Book and Author. A Book has a title, a list of authors, a publication year, a genre, and an ISBN number. An Author has a name.

Your task includes:

1. Create an Author class with a single field name of type String
2. Create a Book class with the following fields. Please put them in the order as described below:
   • title of type String
   • authors of type List<Author>
   • publicationYear of type Int
   • genre of type String
   • isbn of type String
3. Implementing the addBook(book: Book) method to add a new book to the library. HINT: use some collection here. Book duplicates are allowed.
4. Implementing the searchByTitle(title: String): List<Book> method to return a list of books that contain the given title. The search should be case-insensitive.
5. Implementing the searchByAuthor(authorName: String): List<Book> method to return a list of books written by authors whose names contain the given string. This search should also be case-insensitive.
6. Implementing the searchByGenre(genre: String): List<Book> method to return a list of books that match the given genre exactly, with case-insensitivity.