Add table of contents section in readme

[T-Fathima]

Is your feature request related to a problem? Please describe.
Currently the readme doesnt have any table of contents which becomes difficult to navigate through sections.

Describe the solution you'd like
I would like to implement it.

Additional context
@UppuluriKalyani I want to work on it.
Please assign it to me.

[github-actions]

Thanks for creating the issue in ML-Nexus!🎉
Before you start working on your PR,
Pull the latest changes to avoid any merge conflicts.

• Attach before & after screenshots in your PR for clarity.
• Include the issue number in your PR description for better tracking.
  Happy open-source contributing!☺️

[github-actions]

This issue has been automatically closed because it has been inactive for more than 30 days. If you believe this is still relevant, feel free to reopen it or create a new one. Thank you!