Added Pronic Number Checker

[LiQuiD-404]

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Description 📜

A simple JavaScript Project to check whether a number is a Pronic Number or not.

Fixes #1188

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Type of change 📝

• [x] Add a new project

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Domain of Contribution 📊

• [x] Project using HTML, CSS & JS

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Checklist ✅

• [x] I have performed a self-review of my own code or work.
• [x] I have commented on my code, particularly in hard-to-understand areas.
• [x] My changes generate no new warnings.
• [x] I'm GSSoC'22 contributor

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Screenshot

s / Gif (Recommended) 📸

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Name	Status	Preview	Updated
web-dev-project-kart	✅ Ready (Inspect)	Visit Preview	May 17, 2022 at 10:21AM (UTC)

[Mrjoy832]

Add Demo Video in readme and describe the topic

[LiQuiD-404]

@Mrjoy832 Added Demo Video. Kindly review

[Mrjoy832]

giving label-2 for well structured readme

[LiQuiD-404]

giving label-2 for well structured readme

Thank you so much. Made me emotional🥲