feat: Adding a custom scroll bar

[Souvik34]

What feature?

There will be a custom scroll bar inspite of the by default one

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• [X] I have checked the existing issues
• [X] I have read the Contributing Guidelines
• [X] I agree to follow this project's Code of Conduct
• [X] I want to work on this issue

[Saurav-Pant]

Please share the video, explaining the issue.