ADD “Scroll to Top” button feature

[Mrigakshi-Rathore]

Description

Added a “Scroll to Top” button that appears when the user scrolls down the page. Clicking the button smoothly scrolls the user back to the top of the page. This improves user experience on long pages.

Type of change
• Bug fix
• New feature ✅
• Improvement
• Documentation update

How Has This Been Tested?
• Verified that the button appears after scrolling down.
• Checked that clicking the button scrolls the page smoothly to the top.
• Tested responsiveness on desktop and mobile devices.
• Ensured no conflicts with existing UI elements.

Checklist:
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code where necessary
• I have added tests that prove my feature works

Screenshots:

[github-actions]

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