docs: add LLM dropdown (#1583)

closes: apify/apify-web#5475
Copied logic from
apify/crawlee#3267

Author: birosrichard

website/package.json

@@ -18,6 +18,7 @@
     "devDependencies": {
         "@apify/eslint-config-ts": "^0.4.0",
         "@apify/tsconfig": "^0.1.0",
+        "@apify/ui-icons": "^1.23.0",
         "@docusaurus/module-type-aliases": "3.9.1",
         "@docusaurus/types": "3.9.1",
         "@types/react": "^19.0.0",