chore: Add Comprehensive Documentation for the Project

[alfredfrancis]

Clear, step-by-step guides that will help users get started quickly and make the framework more accessible.

• Setting up the project environment.
• Building and deploying a chatbot.
• Integrating external APIs for Intent Fulfilment
• Integrating Chatbot to different channels (web, facebook.. etc)

[ponnimaria]

hey, I can help with this. Shall i start working on a PR ?

[alfredfrancis]

Please do. let me know which topic are you starting with