Add Table of Contents to README File

[T-Fathima]

Issue Description

The current README file lacks a Table of Contents, which makes it difficult for users to navigate through the document. Adding a Table of Contents will help improve accessibility and readability, especially for larger README files with multiple sections.

Screenshots or Examples (if applicable)

Proposed Solution (optional)

Suggested Solution:
Add a Table of Contents at the top of the README file that includes links to the following sections:
Introduction
Installation
Usage
Contribution Guidelines
License

Checklist

• I have checked the existing issues.
• The changes don't break the code.
• Please attach the screenshots and video of the development work once it is done.

Additional Comments (optional)

@GarimaSingh0109 I would like to work on it.
Please assign it to me under gssoc-ext and hacktoberfest

[Sheetalkumari20]

@GarimaSingh0109 I would like to work on it.
Please assign it to me under gssoc-ext