Fixed Contributors page, HowtoPlay page and Fixed Homepage Buttons UI

[srinidhifd]

PR Description 📜

Please include summary related to the issue you have fixed and describe your PR in brief over here by specifying the issue number on which you were working below

Fixed Homepage Buttons UI Added Navbar in Contributors Page Added Navbar in HowtoPLay Page added working discord link updated Chrome gaming github link in footer

Fixes #430

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@ayush-t02 I have fixed all the 6 issues , Raised this PR . Please look into this. Let me know if any merge conflicts arise. ## Thank you soo much for contributing to our repository 💗