docs: add LLM dropdown menu to documentation pages (#12235)

* docs: add LLM dropdown menu to documentation pages

* fix build errors

www/apps/resources/app/not-found.mdx

@@ -1,4 +1,4 @@
-import { CardList } from "docs-ui"
+import { CardList, H1 } from "docs-ui"
 import {
   BookOpen,
   AcademicCapSolid,
@@ -10,7 +10,7 @@ export const metadata = {
   title: `Page Not Found`,
 }
 
-# {metadata.title}
+<H1 hideLlmDropdown>{metadata.title}</H1>
 
 The page you were looking for isn't available.