Fix: Enforce password validation to require minimum of 8 characters

[mohit-1710]

Description

This pull request fixes an issue where the login and sign-up pages were accepting passwords with less than 8 characters. The new validation ensures that users must enter a password with a minimum of 8 characters.

Changes Made

• Added password length validation to both the sign-up and login forms.
• Updated error messages to notify users if their password is too short.

Issue Resolved

Fixes: Issue #20

How Has This Been Tested?

• Manual testing of the login and sign-up forms with various password lengths.
• Verified that passwords less than 8 characters trigger an error message, and passwords 8 characters or longer successfully pass validation.

Screenshots

Checklist

• [x] My code follows the code style of this project.
• [x] I have performed a self-review of my own code.
• [x] This PR resolves an open issue.

Additional Comments

Please let me know if further improvements are needed. Thanks for reviewing this PR!