Fixed issue #955

[LNischala]

Closes: issue #955

-Title: Add icons for email and password and also the onclick functionality for password icon in LoginSignUpForm (Front-end project)
-Name: Nischala Lakkaraju
-Idenitfy yourself: GSSoc Extd 2024 contributer
-Describe the add-ons or changes you've made 📃
I have added the required icons beside the input fields and implemented the functionality of the password toggle icon. The locked icon ensures the password is secured and the unlock icon shows the entered password.
Additionally, I also changed the color of 'Login' and 'Sign up' for better visibility. If this additional change isn't needed, let me know to undo it.
BEFORE->

AFTER->

Screenshots 📷

Type of change ☑️

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist: ☑️

• My code follows the Contributing Guidelines & Code of Conduct of this project.
• This PR does not contain plagiarized content.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• My changes generate no new warnings.

Note to reviewers 📄

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[Avdhesh-Varshney]

Never commit directly in main branch.
This time, I've approved it.