add a table of content in readme so that user can easily navigate

[Sha-mbhavi]

@SGCODEX Please assign me this issue(ecwoc)

[ShreeyaManwatkar]

@SGCODEX Hey Please assign me this issue, I am a beginner and have read Code of Conduct ✅
[ I am under the ECWoC' 26]

[SGCODEX]

Heyy @Sha-mbhavi, sounds good. Please go ahead.

[ShreeyaManwatkar]

Hello @SGCODEX if for some reason @Sha-mbhavi is unable to complete the assigned task, I am ready to contribute to this issue. Please check and tell. Thank you :)

[SGCODEX]

Hello @ShreeyaManwatkar , noted. But we will give some time to @Sha-mbhavi to complete this task. After that I will assign it to you if not completed. Thanks.