feat(dev): Ported dev site to named exports

sites/dev/components/help-us.mjs

@@ -0,0 +1,18 @@
+import { Popout } from 'shared/components/popout.mjs'
+
+export const HelpUs = ({ slug = '/' }) => (
+  <details className="mt-4">
+    <summary>Click here to learn how you can help us improve this page</summary>
+    <Popout tip className="max-w-prose">
+      <h6>Found a mistake?</h6>
+      You can{' '}
+      <a
+        href={`https://github.com/freesewing/freesewing/edit/develop/markdown/dev/${slug}/en.md`}
+        className="text-secondary font-bold"
+      >
+        edit this page on Github
+      </a>{' '}
+      and help us improve our documentation.
+    </Popout>
+  </details>
+)