docs: change configurations to make v2 the main docs (#9729)

* docs: change configurations to make v2 the main docs

* move api routes to top level

* remove api prefix

* update opengraph images

* show v1 link

* add redirect to v1

www/apps/book/tailwind.config.js

@@ -32,8 +32,8 @@ module.exports = {
       "search-no-result-dark": "url('/images/search-no-result.svg')",
       "magnifying-glass": "url('/images/magnifying-glass.svg')",
       "magnifying-glass-dark": "url('/images/magnifying-glass-dark.svg')",
-      "bg-stripes": "url('/v2/images/bg-stripes.png')",
-      "bg-stripes-dark": "url('/v2/images/bg-stripes-dark.png')",
+      "bg-stripes": "url('/images/bg-stripes.png')",
+      "bg-stripes-dark": "url('/images/bg-stripes-dark.png')",
     },
   },
 }