refactor delete /books/:id path, refactor adding deleted book with post /add, refactor get books/id to return data with rating

refactor /editReview/:id path

refactor /filteredBooks route

refactor /books/:bookId route

refactor /add route

refactor and test / route, works correctly

refactor /delete route

refactor /editReview route

refactor /add route

refactor / route (move try catch to the controller)

change queries.sql with the whole database dump

add validation without testing

add book deletion logic without testing (/delete:id route)

add column isdeleted to the book table, changelogic of all routes due to this

fix logic for editBookReview to check whether there was any rows affected, this function is used in /editReview:id route