Add home and Back to top button

[Dhirajgithub813]

Before creating this PR, please confirm the following:
-Added a Home button for quick access to the main page.

Added a Back to Top button for easier scrolling and navigation.
Additionally, the color scheme of these buttons has been updated for better visibility and consistency..

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First thing, PLEASE READ THIS: ReactPlay Code Review Checklist

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)
issue no. #1675

Type of change

[x] New feature (non-breaking change which adds functionality)
Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• [ x] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Verified functionality locally on both desktop and mobile.

Ensured no new warnings or errors appear in the console.

Checked accessibility and responsiveness across different screen sizes.

Checklist:

• [ x] I have performed a self-review of my own code
• [x ] I have commented my code, particularly in hard-to-understand areas
• [ x] I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings
• [x ] I have added tests that prove my fix is effective or that my feature works
• [x ] New and existing unit tests pass locally with my changes
• [ x] Any dependent changes have been merged and published in downstream modules

Screenshots or example output

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