new changes

[Raunak1375]

Fix #8

This pull request introduces the complete Celtrix project, which consists of two major components:

A Command-Line Interface (CLI) tool to automate the creation of new backend projects.

A production-ready Backend Template that includes all the features specified in the original issue, such as logging, rate limiting, authentication, and more.

Changes Implemented

1. The celtrix-cli Tool 🚀
   A new CLI tool, installable via npm, has been created to scaffold a new backend project with a single command.

Command: celtrix create

Interactive: Uses inquirer to prompt the user if the target directory already exists, preventing accidental data loss.

User-Friendly Output: Uses chalk for colored and easy-to-read console messages.

Core Technology: Built with Node.js and commander.js for robust command handling.

2. The Production-Ready Backend Template ⚙️
   The CLI generates a new project based on a powerful and scalable backend template built with Express.js and TypeScript. This template serves as the solution to the core task requirements.

Authentication: Implemented JWT-based authentication with Role-Based Access Control (RBAC). Middleware is included to protect routes and authorize specific roles (e.g., admin).

Logging: Integrated Winston for robust, asynchronous logging. Logs are directed to the console in development and to error.log / combined.log files in production.

Rate Limiting: Added middleware using express-rate-limit to prevent brute-force attacks and API abuse.

File Utilities: A dedicated service (file.service.ts) can parse the contents of uploaded PDF and XLSX files using pdf-parse and xlsx.

Notifications: A basic NotificationService stub is included, demonstrating where to integrate email, push, or WebSocket notifications.

Clean Architecture: The project follows a clean and scalable structure, separating concerns into controllers, services, middlewares, routes, and configuration.