feat: add UnitVerse — interactive unit converter with history & favorites

[soumyasync]

📝 Pull Request Description

Related Issue

Closes #7023

Summary

This PR introduces UnitVerse, an interactive multi-category unit converter designed with a modern dashboard-style UI.

Beyond basic conversions, UnitVerse focuses on real-time interaction, persistent state management, and usability for repeated workflows, making it both a practical utility and a strong demonstration of real-world frontend architecture.

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New project addition
• 🚀 New feature or UI/UX enhancement
• ♻️ Code refactoring /clean-up
• 📝 Documentation update
• ⚙️ GitHub Workflow automation or DX improvements

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🛠️ Changes Made

• Added new project UnitVerse under public/UnitVerse
• Implemented multi-category unit conversion (Length, Weight, Temperature, Time, Speed)
• Developed real-time conversion logic with smart rounding-off
• Added conversion history (entries with timestamps)
• Implemented favorites system using LocalStorage
• Added unit swap, copy to clipboard, and input validation features
• Designed responsive dashboard-style UI with side panels
• Integrated toast notifications and unique conversion counter
• Updated projects.json to register the project
• Added comprehensive README and project assets

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🧪 Testing and Verification

Local Validation

• I have run node scripts/validateProjects.js locally and it passed with zero errors.

Browser Compatibility Check

• Tested and verified in Google Chrome
• Tested and verified in Mozilla Firefox
• Tested and verified in Safari / Microsoft Edge

Responsive & Accessibility Checks

• Verified responsive layout on Mobile viewports (using DevTools)
• Verified responsive layout on Tablet viewports
• Keyboard navigation and focus outlines checked
• Semantic HTML and ARIA labels checked

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📷 Screenshots / Video Recording

UnitVerse.1.1.mp4

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🤝 Contributor Checklist

• My code follows the code style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation / README files accordingly.
• My changes generate no new warnings or console errors.
• There are no unrelated changes or formatter noise in this PR.

[vercel]

@soumyasync is attempting to deploy a commit to the Dhairya Gothi 's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊