Issue 103 | Implement password reset functionality

[Shazzz135]

This pull request implements a complete password reset flow with two-factor verification, including backend logic, email delivery, and frontend integration. The changes add secure code generation and validation, update the user model to store verification codes, and provide user-friendly frontend forms and flows for requesting a password reset, verifying the code, and setting a new password.

Backend changes:

Password reset and verification logic:

• Added new endpoints to authRoutes.ts for sending a password reset verification code, verifying the code, and updating the password, including all necessary input validation and error handling.
• Implemented a utility (passwordReset.ts) for code generation, validation, and password update logic, ensuring security and clarity of the password reset process.
• Created a code generator utility for generating and hashing 6-digit codes, and for calculating code expiration.

User model updates:

• Extended the User model and schema to include twoFactorCode and twoFactorCodeExpiry fields for storing password reset verification codes and their expiration times. [1] [2] [3]

Email delivery:

• Enhanced the EmailService utility to support Gmail SMTP and send styled password reset code emails. Added a method to send the verification code email to users. [1] [2]

Frontend changes:

Password reset flow:

• Updated the ForgotPassword component to call the backend, handle loading and errors, and redirect users to the 2FA code verification page after requesting a reset. [1] [2] [3] [4]
• Improved the NewPassword component to submit the new password to the backend, handle loading and errors, and redirect to a confirmation page on success. [1] [2] [3] [4]
• Updated routing to reflect the new password reset flow, renaming the route to /reset-password.

Minor improvements:

• Fixed a BOM issue in App.tsx and made minor formatting adjustments. [1] [2]

These changes together provide a secure, user-friendly, and robust password reset experience for users.

Closes #103

[Flapjacck]

LGTM. make sure to close issue in comment in future