Add active section highlighting for navbar

[akshatsinghai6682-sketch]

Description

Added active section highlighting for the navbar. The corresponding navigation link is automatically highlighted based on the section currently visible in the viewport, improving navigation and user experience.

Related Issue

Closes #207

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that causes existing functionality to change)
• Documentation update
• Refactor
• Performance improvement

Changes Made

• Added JavaScript to detect the active section while scrolling.
• Applied an active class to the corresponding navbar link.
• Added styling for active navigation links to improve visual feedback.

Testing

• Ran "npm test" — all tests pass
• Tested manually (if applicable)

Screenshots (if applicable)

Active navbar link updates correctly when navigating through Home, Features, Themes, Try It Live, Guide, and About sections.

Checklist

• My code follows the project's code style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation if necessary
• My changes are scoped to a single issue

[vercel]

@akshatsinghai6682-sketch is attempting to deploy a commit to the Dot_NotSam's projects Team on Vercel.

A member of the Team first needs to authorize it.

[SamXop123]

thank you for contribution

[github-actions]

🎉 Congratulations @akshatsinghai6682-sketch! 🎉

Your pull request has been successfully merged into samdev-pulse! Thank you so much for your valuable contribution and effort. Every single improvement helps make samdev-pulse a better profile experience for everyone! 🙌

🚀 What's Next?

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Have any questions, want feedback, or just want to discuss further contributions? Feel free to reach out directly to the maintainer on Discord: dot_notsam

Thank you again, and keep up the amazing work! 💻✨