* Expand callouts functionality
Expand the callouts functionality to include a base set of types and allow for more customization.
* Grammar
* Include documentation for callouts in `README.md`
* Replace JS use in feather icons with SVG
There's still JS for the toggle functionality, but no more Javascript to
refresh the icons.
* Add support for SimpleIcons
This is based on https://github.com/simple-icons/simple-icons-font,
release 13.3.0, with font and css copied in.
Since Feather Icons and Simple Icons differ in purpose and naming
scheme, old social icons still point to feather. To add simple icons,
just prefix their name with "simple", e.g.
- name: "mastodon"
icon: "simple:mastodon"
url: "https://foo.social/@foo"
Resolvesathul/archie#69, athul/archie#95, athul/archie#49
Timo Montalto
Kyle Donnelly
Mansoor Barri
Patrick Georgi
Hyacinthe Cartiaux
Artem Ryabkov
Julius Rickert
ADSWT518
Athul Cyriac Ajay
Robbi Nespu
Aron Gergely