Show GitHub profile pictures in list instead of icon

[rkotze]

If the user has a GitHub profile retrieve the profile photo to show in the list of authors. Replace the user icon.

Could include a GitHub user name field in the .git-coauthors file

https://stackoverflow.com/questions/22932422/get-github-avatar-from-email-or-name

To add GitHub profile picture

vscode.Uri.parse(
    "https://avatars.githubusercontent.com/rkotze?size=100"
);