Add index feature to code

[TusharAnekar]

Index Feature

Added basic index.html file which contains html5 code snippet.

• A div containing h1 element saying what the document is about
• User can add new div below so they can check if it getting added in the main branch if pull request is accepted by Hitesh sir

[TusharAnekar]

Please accept this pull request Hitesh Sir

[faisalkhandev]

Hey, I just wanted to take a moment to thank you for all the hard work you’ve put into our project. Your contributions have significantly improved the codebase, and I truly appreciate your dedication and expertise. Thanks again,