Feat: No password security checker

### Describe the feature

@harshalhonde21 There is not any password checker while sign up eg. password length or characters etc . so this is making the password vulnerable as it does not have any specification

### Add ScreenShots

https://github.com/user-attachments/assets/828dae77-96d3-4ae6-b339-d9ed2cc39f4f

### Record

- [X] I agree to follow this project's Code of Conduct
- [X] I'm a GSSOC'24 contributor
- [X] I want to work on this issue

No files, tests, password rules, or signup entry points are named. First locate the signup flow across the React and Express parts of the project, then clarify the required length and character rules before implementation; done should be demonstrated by validation tests covering the agreed requirements.

Written by the indexing model from the issue text.