@azizmejri1 - I added an info banner with a link to
https://neon.com/docs/auth/production-checklist#email-provider under the
email verification toggle so users know to not rely on it for production

<img width="506" height="377" alt="image"
src="https://github.com/user-attachments/assets/7f403de7-de2f-462e-84c0-8eb0779af87a"
/>

## Summary
- Add a compact, clickable info banner below the Neon email verification
toggle that recommends configuring a custom email provider for
production.
- Link opens the Neon Auth production checklist (email provider
section).
- Add `integrations.neon.customEmailProviderHint` strings for English,
Portuguese (Brazil), and Chinese (Simplified).

## Test plan
- Open Neon integration for a connected Next.js app and confirm the
banner appears under email verification with correct copy.
- Click the banner and confirm the Neon docs open in the browser.