DOCS UPDATE: Align the README.md as per the current system

[smokeyScraper]

Is this related to an existing part of the documentation?

• Yes, it is related to an existing section

What needs to be updated?

📌 Current Documentation Issue

Current whole readme.md is outdated with the initially planned system which was based on a central LLM and now changed to LangGraph agents.

✨ Proposed Changes

This issue requires updating whole of the README.md by referring to the notion document and excalidraw workflows.
Notion

Relevant Documentation Link (if any)

No response

Record

• I agree to follow this project's Code of Conduct
• I want to work on this update

[DhruvK278]

Hi @smokeyScraper could u assign me this task, I can also add a fresh installation guide to run this project as there is no guide for it.