Feat: Sitemap.xml

[shraddha761]

Describe the feature

A sitemap is a file that lists all the pages of a website, helping search engines understand its structure and content. It enhances search engine optimization (SEO) efforts by improving website visibility and indexing. I believe adding sitemap would be a perfect addition to this project.

Add ScreenShots

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• I'm a GSSOC'23 contributor
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[avinashkranjan]

Go Ahead @shraddha761