feat: standalone page config to use in companion (#27018)

* feat: hide navigation when ?standalone=true URL parameter is present

Co-Authored-By: peer@cal.com <peer@cal.com>

* feat: standalone page config to use in companion

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: peer@cal.com <peer@cal.com>

packages/lib/hooks/useIsStandalone.ts

@@ -0,0 +1,8 @@
+"use client";
+
+import { useSearchParams } from "next/navigation";
+
+export const useIsStandalone = () => {
+  const searchParams = useSearchParams();
+  return searchParams?.get("standalone") === "true";
+};