Move sculpin-old files to sculpin-old directory

sculpin-old/source/_partials/post/old-post-message.html.twig

@@ -0,0 +1,8 @@
+{% if page.date|date('U') < 'now'|date_modify('-12 months')|date('U') %}
+    <div class="border-2 border-blue-600 p-4 mb-6">
+        <p class="text-sm mb-0">
+            <span class="font-bold">Warning:</span>
+            This post is over a year old. I don't always update old posts with new information, so some of this information may be out of date.
+        </p>
+    </div>
+{% endif %}