MartialBouyssou/S103-Biblio ? reverse-engineered prompt

Build me a simple shell based library app called Bibliotheque.

I want a small command line tool that lets me keep track of books, add a new book, list everything, search by title or author, mark a book as borrowed or returned, and remove a book if needed. It should feel easy to use from the terminal, with clear messages in French if possible.

Please make it work with plain shell scripts and store the data locally so it keeps working between runs. If it helps, add a few example books and a simple menu so I can test it right away. Keep the structure clean and easy to understand, and make sure the main script runs without extra setup.

If you need to check anything about current shell practices or small command line UX ideas, look it up online first.