Update README.md by adding Table of Contents

[Maryam0330]

Description

This change updates the README.md file to now include a hyperlink based navigation which makes easier to access different sections of the long README file

• It doesn't exactly fix an existing issue but it will help make the documentation better

Type of change

Please delete options that are not relevant.

• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• I have maintained a clean commit history by using the necessary Git commands
• I have checked that my code does not cause any merge conflicts

Screenshots (if applicable)

Add screenshots to help explain the changes (if necessary).

[Kota-Karthik]

@Maryam0330
Please follow the PR template we provided
add issue number

[Maryam0330]

Done! 👍

[Wahid7852]

@Maryam0330 What is your Issue Number?

[Maryam0330]

It doesn't solve a pre-existing issue, it's just a simple documentation update for better navigation. Do you want me to raise an issue first?

[techy4shri]

@Maryam0330 you need to go through the follwoing texts before making any PR:

1. Readme.md (super helpful in knowing the basics)
2. Contributing.md (THAT'S IMPORTANT DO NOT SKIP)

You do not raise a PR without raising an issue first and this repository does not accept readme contributions. Your PR is being rejected due to being invalid.