feat: add initial authentication structure

[Thiyophin]

Description

This PR introduces the Phase 1 MVP foundation for Book My Venue, a venue booking platform.

Features Implemented

• User authentication system
  • User signup
  • User login
  • Password hashing using bcrypt
  • JWT token generation
• MongoDB Atlas integration
• User model and role-based structure (User, Venue Owner, Admin)
• Venue model implementation
• Venue listing API (GET /api/venues)
• React frontend setup with Vite
• Tailwind CSS integration
• Signup and Login pages
• User homepage with venue listing
• API integration between frontend and backend
• Routing setup using React Router

Phase Category

• Phase 1: MVP Submission (Base Foundation)
• Phase 2/3: Feature Implementation or Modularization
• Phase 4: Scalability Optimization
• General (Documentation, Bugfix, Chore, etc.)

Tech Stack (For Phase 1 MVP Submissions)

• Frontend: React, Vite, Tailwind CSS, Axios, React Router DOM
• Backend: Node.js, Express.js, JWT Authentication, bcryptjs
• Database: MongoDB Atlas, Mongoose

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature / Module (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• I have read the Contribution Guidelines.
• My code follows the community spirit and standards of the WeCode community.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings or errors.

AI Disclosure

• I did NOT use AI tools to generate this code.
• I used AI tools (e.g., Copilot, ChatGPT, Claude) to help write this code, and I have fully reviewed, tested, and understand the output.

Screenshots / Screen Recording (if applicable)

Authentication Pages

• Signup Page
• Login Page

Homepage

• Venue listing homepage displaying venues fetched from the backend API