message: fix: Adding Icon to theme export
  I'm not sure if this was intentional, but there's no mention of Icon in the theme, despite being a theme file to customize icons. If it's not exported with the theme, I'm not sure how this file was ever doing anything. :)
diff: @@ -9,6 +9,7 @@ import Code from "./code"
  import Divider from "./divider"
  import Modal from "./modal"
  import Heading from "./heading"
  +import Icon from "./icon"
  import Input from "./input"
  import InputAddon from "./input-addon"
  import Link from "./link"
  @@ -36,6 +37,7 @@ export default {
  Accordion,
  Button,
  Heading,
  + Icon,
  Alert,
  Badge,
  Avatar,
  