add: books, borrowings, home, login, membership, register, reward, userinsights, wishlist, themes

add: blazor web assembly.

add: blazorfrontend

add: change userid to guid and small fixes

add: loyalty reward system

feat: restructure backend project, add configuration files, implement authentication, user and book management, and enhance borrowing and subscription features

chore: remove LibraryManagement.Frontend project reference from solution

add mvc

add: frontend

add feat: swagger

feat: authorization

Add project files.