Add table of contents section for the readme file

[T-Fathima]

Description

I would like to add the table of contents section for the readme file for better readability and user experience.

Please assign it to me under gssoc-ext and hacktoberfest.
@mdazfar2 I would like to work on it.

Checklist

• I have checked the existing issues
• I have read the Contributing Guidelines
• I'm a GSSoC'24-Extd contributor
• I'm a Hacktoberfest'24 contributor
• I am willing to work on this issue (optional)

[github-actions]

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[github-actions]

Hello @T-Fathima! Your issue #1432 has been closed. Thank you for your contribution!