Made the footer section interactive with CSS Styling

[ThunderShadows]

The following changes has been made into the Pull Request-

1. Made a newsletter section towards the right of the footer section.
2. Added GitHub icon with the href link.
3. Aligned the Social Media Icons below newsletter section.
4. Made changes to the animations and the styling to the external links.
5. Hovering effect and readability without invoking any changes to the font and color has been made.

Fixes the issue number #288

@Rizwan102003 @SaurabhS55 @pulkitpathak99 Thank you for your time! Please add the necessary labels.

[Rizwan102003]

@ThunderShadows please remove the newsletter section,we would not be needing that for now.