[Enhancement]: Adding sticky navbar for all pages for UI consistency.

[KalangiGeetaneha]

What can be improved?

The website currently lacks a sticky (fixed) navbar, causing navigation elements to disappear when scrolling. Users must scroll back to the top to access navigation links, which reduces usability. Additionally, some pages that attempt to implement a sticky navbar show layout shifts or content overlap, breaking the page structure.

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊