[Security] Password need to meet minimum requirements for signup

[smog-root]

i'm expecting a gssoc-ext with level3 and a hacktoberfest-accepted label!

Password Requirements:

At least 8 characters long.
At least 1 uppercase letter (A-Z).
At least 1 lowercase letter (a-z).
At least 1 number (0-9).
At least 1 special character (e.g., !@#$%^&*()).

Now, when a user tries to register, they will receive immediate feedback if their password does not meet these criteria. Let me know if you need any further changes or additional features!

i have already done the task:

signup.html

i'm wait for you to assign!

[Harshdev098]

Just add it for both stakeholders and faculty authentication also

[smog-root]

Hoo shit! I commited. I added only for sigup.

I will add to stk_signup.html in another PR!!