[Docs] Update readme with vision, mission, why QuickFactChecker and trouble shooting section

[Akshayaqueen]

🔍 Have You Searched Existing Issues?

• I have searched the existing issues to avoid duplicates

📝 What's wrong with the existing documentation?

This can give me a clear clarity about the project

📎 Supporting Material

No response

🙌 Contributor Checklist

• I have reviewed the existing documentation
• I agree to follow this project's Code of Conduct
• I am a GSSOC'25 contributor
• I want to work on this issue