Added Back-to-top scroll up button

[tatheer-fathima]

Description

This pull request adds a bottom-to-top scroll-up button to improve user navigation by allowing them to quickly scroll back to the top of the page.

Type of PR: #308

• Bug fix
• Feature enhancement
• Documentation update
• Other (specify): _______________

Screenshots / videos (if applicable)

A screenshot or video showing the scroll-up button functionality in action.

Checklist:

• I have performed a self-review of my code
• I have read and followed the Contribution Guidelines.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have commented my code, particularly in hard-to-understand areas.

@sanjay-kv Please review and merge 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! 😊