Closes#848
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### Summary by CodeRabbit
- New Feature: Added "Environment name" as a new value type in the
SetVariable function, allowing users to distinguish between 'web' and
'whatsapp' environments.
- Refactor: Simplified session state handling in `resumeWhatsAppFlow.ts`
for improved code clarity.
- Refactor: Updated `startWhatsAppSession.ts` to include an initial
session state with WhatsApp contact and expiry timeout, enhancing
session management.
- Bug Fix: Improved null handling in `executeSetVariable.ts` for
'Contact name' and 'Phone number', preventing potential issues with
falsy values.
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### Summary by CodeRabbit
**New Features:**
- Added WhatsApp integration feature to the Pro plan.
**Refactor:**
- Introduced the ability to exclude specific plans from being displayed
in the Change Plan Modal.
- Renamed the function `isProPlan` to `hasProPerks`, enhancing code
readability and maintainability.
- Updated the `EmbedButton` component to handle a new `lockTagPlan`
property and use the `modal` function instead of the `Modal` component.
**Chore:**
- Removed the `whatsAppPhoneNumberId` field from the `Typebot` model
across various files, simplifying the data structure of the model.
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### Summary by CodeRabbit
- New Feature: Introduced session expiry timeout for WhatsApp
integration, allowing users to set the duration after which a session
expires.
- New Feature: Added an option to enable/disable the start bot condition
in WhatsApp integration settings.
- Refactor: Enhanced error handling by throwing specific errors when
necessary conditions are not met.
- Refactor: Improved UI components like `NumberInput` and
`SwitchWithLabel` for better usability.
- Bug Fix: Fixed issues related to session resumption and message
sending in expired sessions. Now, if a session is expired, a new one
will be started instead of attempting to resume the old one.
- Chore: Updated various schemas to reflect changes in session
management and WhatsApp settings.
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