Add quadrant overview pages

js/components/Item.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import classNames from 'classnames';
+
+export default function Item({ item, noLeadingBorder = false}) {
+  return (
+    <a
+      className={classNames('item', {
+        'item--no-leading-border': noLeadingBorder,
+      })}
+      href={`/${item.quadrant}/${item.name}.html`}
+    >
+      <div className="item__title">{item.title}</div>
+      {
+        item.info && (
+          <div className="item__info">{item.info}</div>
+        )
+      }
+    </a>
+  );
+}