Enhancing User Experience: Introducing WhatsApp SMS Functionality & AI Assistant example in docs using it

[KartikeyMish]

Scope

This pull request introduces WhatsApp SMS functionality via Twilio and includes an example in the documentation for an AI assistant designed for a text-based pizza restaurant.

• Added WhatsApp SMS functionality using the textbase/whatsappsms.py module.
• Created a Twilio class with methods to sendsms() and extract_phone_number() .
• Integrated Twilio with the main application (main.py) to send messages when certain conditions are met.

Note: This may not be a very furnished way to implement this but , its just a stepping stones to build this functionality & i believe we can together improve this very much

Screenshots

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[Include relevant screenshots if applicable]

• When message is sent to the user :
  
  

• Pizza AI implement WhatsappSMS Example :
  
  

Code improvements

• Added a generic utility for sending WhatsApp messages (whatsappsms.py).
• Improved overall code structure and maintainability.

Developer checklist

• Manually tested code on desktop and mobile browsers.
• Code review completed.
• Removed all personal credentials (API keys, etc.) from the code.

Documentation

• Added a use case example in the documentation for an AI assistant in a pizza restaurant scenario.
• Demonstrated how to use the WhatsApp SMS feature for order updates.

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Name	Status	Preview	Comments	Updated (UTC)
textbase	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 7, 2023 9:18pm

[KartikeyMish]

Update: Earlier I made changes in .env.example by adding the environment variables for twilio but it was causing merge conflicts , so I deleted that file.