add animated progress bars submission

[scriptedbyshivam]

Closes #55784

📝 Summary

This PR adds a self-contained Animated Progress Bars example to the submissions/examples/ directory, adhering to all contribution guidelines.

🎯 What's Included

• submissions/examples/progress-bars-[initials]/demo.html: Markup with Intersection Observer for scroll-triggered animations.
• submissions/examples/progress-bars-[initials]/style.css: Clean styling with gradient fills and accessibility support.
• submissions/examples/progress-bars-[initials]/README.md: Clear documentation on usage and value.

✅ Checklist

• Strictly inside submissions/examples/ (no core files touched).
• Unique initials appended to folder name to prevent naming collisions.
• Includes prefers-reduced-motion media query.
• Tested locally by opening demo.html in Chrome/Firefox.

Ready for maintainer review! 💜

[SAPTARSHI-coder]

✅ Submission Validation Passed!

Great job! All required files are present and valid.

📁 Folder: submissions/examples/progress-bars-usr!213289

Files found:

• ✅ demo.html
• ✅ style.css
• ✅ README.md

🚀 Next Steps:

• A maintainer will review your PR
• Respond to any feedback if requested
• Once approved, your contribution will be merged!

Thank you for contributing to EaseMotion CSS! 🎉

[github-actions]

🎉 Congratulations on your PR merge, @scriptedbyshivam! 🚀

Thank you so much for your valuable contribution to EaseMotion CSS! Your code is now merged into the main branch.

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[github-actions]

🎉 Pull Request Integrated!

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