feat(GlBadge): Add icon badge example and update font weight guidelines
Closes #735 (closed). Adds the icon badge example and updates the font weight guidelines to docs. Follow up from gitlab-org/gitlab-ui!1786 (merged).
Edited by Jarek Ostrowski
Closes #735 (closed). Adds the icon badge example and updates the font weight guidelines to docs. Follow up from gitlab-org/gitlab-ui!1786 (merged).