[story] Add icons / logos for different git forges / social profiles #74
Description
Summary
Add icons / logos for git forges and social profiles instead of using text
Background
Currently when someone adds a git forge or a social media to their profile, it appears as a text link beneath their profile, e.g. a GitHub profile appears as GitHub below their profile. Instead of using text, it would be more visual and user-friendly to use an icon or logo from the git forge, e.g. 
for a GitHub profile.
Details
@kennedy had looked into this for #69 but it was a little tricky to do. If possible, SVGs should be the preferred format for the logo, but a hi-res PNG is also acceptable.
Outcome
More visual and user-friendly appearance for common git forges / social media profiles