Remove unnecessary NotFoundException check in WorkerService to streamline worker filtering logic.

Refactor file handling and date parsing in utility functions

Refactor file paths in Book, Visitor, and Worker services to use absolute paths

Remove book, visitor, and worker data files to clean up the project and eliminate unused resources.

Refactor import paths in Book, Visitor, and Worker modules to use relative paths

Remove encryption key file from the project to enhance security and reduce unnecessary files in the codebase.

Refactor serialization logic in BookService, VisitorService, and WorkerService

Initialize NestJS project with basic structure and configurations