Added Login and Signup pages !! #3222

[SrijaVuppala295]

Hello PA,

I have added login and signup pages to the project. These pages are essential for enabling users to create accounts, log in, signup and access the platform's features securely. Implemented form fields for email, password, and confirmation fields.
Created navigation links from the homepage to the login and signup pages.Added basic styling using CSS for layout and responsiveness.

Fixes #3222

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Mark the task you have completed ✅

• I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• I have performed a self-review of my own code or work.
• My changes generates no new warnings.
• I have followed proper naming convention showed in [CONTRIBUTING GUIDELINE](https://github.com/kunjgit/GameZone/blob/main/.github/CONTRIBUTING_GUIDELINE.md.
• I have specified the respective issue number for which I have requested the new game.

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#Screenshot📸

NavBar

Login Page

SignUp Page

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Thank you soo much for the opportunity to contribute in your repository 💗

[kunjgit]

Thank you @SrijaVuppala295 ,for creating the PR and contributing to our GameZone 💗
Review team will review the PR and will reach out to you soon! 😇
Make sure that you have marked all the tasks that you are done with ✅.
Thank you for your patience! 😀