QR Code Reader

[SachinMittal1766]

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Description 📜

Fixes #1503

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Type of change 📝

Please delete options that are not relevant. In order to tick the check box just put x inside them for example [x] like this

• [x] Add a new project
• [x] Modified or enhanced the existing projects
• [x] Improve the readme of any project

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Domain of Contribution 📊

Please delete options that are not relevant. In order to tick the check box just put x inside them for example [x] like this

• [x] Project using HTML, CSS & JS

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Checklist ✅

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• [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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Screenshots / Gif (Recommended) 📸

https://user-images.githubusercontent.com/82721772/167534679-13a41a95-ce18-41d1-8421-f602c2d74841.mp4

In last, it is showing "Can't Scan......." because it that time I uploaded a normal pic not QR. So, it shows that message to user.

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[SachinMittal1766]

@gurjeetsinghvirdee pls review my PR.

[gurjeetsinghvirdee]

https://www.codingnepalweb.com/qr-code-reader-html-javascript/ copied from here