Rewrite styles to scss and use i respective components

src/components/ItemRevision/ItemRevision.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+import Badge from '../Badge/Badge';
+import { formatRelease } from '../../date';
+import { Revision } from '../../model';
+
+export default function ItemRevision({ revision }: { revision: Revision }) {
+  return (
+    <div className='item-revision'>
+      <div>
+        <Badge type={revision.ring}>
+          {revision.ring} | {formatRelease(revision.release)}
+        </Badge>
+      </div>
+      <div className='markdown' dangerouslySetInnerHTML={{ __html: revision.body }} />
+    </div>
+  );
+}

src/components/ItemRevision/item-revision.scss

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+.item-revision {
+  &+.item-revision {
+    margin-top: 40px;
+  }
+}