refactor footer

[marmikpatel19]

For smaller mobile size, the vertical footer takes up too much space, leading to poor UX. Reduce the spacing between components to mitigate this issue.

For larger screen sizes, it is also too big. See second screenshot

Screenshots:

[marmikpatel19]

Consider removing the logo as it already exists in the navbar.

[marmikpatel19]

Consider adding a A "Relatable © 2023" with a link to the github repository

[fraser-mcleod]

This ticket will be used to make styling changes for the footer. Primarily:

• make footer useful with respect to the navbar (needs to have different information)
• Include github link and contact
• Maybe a jump to top button instead of search button
• Also want to fix sizing, especially for mobile