Pong Game files added

[Adit0507]

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Description 📜

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Fixes #57

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Type of change 📝

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• Add a new project

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Domain of Contribution 📊

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• Project using HTML, CSS & JS

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Checklist ✅

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

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Screenshots / Gif (Optional) 📸

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