feat: export types and simplify hook checks and add docs

site/snippets/react/useAddPasskey.tsx

@@ -1,6 +1,6 @@
 import { useAddPasskey } from "@alchemy/aa-alchemy/react";
 
-export function ComponentWithUser() {
+export function ComponentWithAddPasskey() {
   // Assumes the app has context of a signer with an authenticated user
   const addPasskey = useAddPasskey();