🐛 (whatsapp) Fix auto start input where it didn't display next bu… (#869)

…bbles
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
### Summary by CodeRabbit

**Release Notes**

- New Feature: Enhanced WhatsApp integration with improved phone number
formatting and session ID generation.
- Refactor: Updated the `startWhatsAppPreview` and
`receiveMessagePreview` functions for better consistency and
readability.
- Bug Fix: Added a check for `phoneNumberId` in the `receiveMessage`
function to prevent errors when it's undefined.
- Documentation: Expanded the WhatsApp integration guide and FAQs in the
docs, providing more detailed instructions and addressing common
queries.
- Chore: Introduced a new `metadata` field in the
`whatsAppWebhookRequestBodySchema` to store the `phone_number_id`.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/bot-engine/queries/getSession.ts

@@ -1,5 +1,5 @@
 import prisma from '@typebot.io/lib/prisma'
-import { ChatSession, sessionStateSchema } from '@typebot.io/schemas'
+import { sessionStateSchema } from '@typebot.io/schemas'
 
 export const getSession = async (sessionId: string) => {
   const session = await prisma.chatSession.findUnique({