Merge branch 'main' of https://github.com/nebari-dev/nebari-docs into docs/nkp-architecture-explainer

Author: khuyentran1401

docs/src/theme/DocItem/Layout/index.tsx

@@ -0,0 +1,30 @@
+import React from 'react';
+import Layout from '@theme-original/DocItem/Layout';
+import Admonition from '@theme/Admonition';
+import Link from '@docusaurus/Link';
+import { useDoc } from '@docusaurus/plugin-content-docs/client';
+import type LayoutType from '@theme/DocItem/Layout';
+import type { WrapperProps } from '@docusaurus/types';
+
+type Props = WrapperProps<typeof LayoutType>;
+
+export default function LayoutWrapper(props: Props): JSX.Element {
+  const { metadata } = useDoc();
+  const isClassic = metadata.permalink?.startsWith('/classic/');
+
+  return (
+    <>
+      {isClassic && (
+        <Admonition type="danger" title="Deprecated">
+          <p>
+            <strong>Nebari Classic is deprecated.</strong> There is no migration
+            path today. See the{' '}
+            <Link to="/docs/introduction">current Nebari documentation</Link>{' '}
+            for the supported platform.
+          </p>
+        </Admonition>
+      )}
+      <Layout {...props} />
+    </>
+  );
+}