Enhance UI and Authentication System

[Gyani25k]

This pull request includes enhancements to the PDF-Parser project by improving the user interface and upgrading the authentication system.

Changes Made:

• UI Improvements:

  • Updated homepage.html to use Bootstrap for a modern and responsive design.
  • Ensured consistent styling throughout the application.

• Authentication Enhancements:

  • Integrated password hashing using Werkzeug's generate_password_hash and check_password_hash for more secure password storage.
  • Modified user login and registration routes to utilize hashed passwords for authentication.

These enhancements aim to improve user experience and security in handling user credentials.