Customized scroll bar

[Amruta7203]

Resolves #474

Description

Added a custom scroll bar for website enhancement.

Type of PR

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

Screenshots / videos (if applicable)

[Attach any relevant screenshots or videos demonstrating the changes]

scroll.webm

Checklist:

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

Additional context:

[Include any additional information or context that might be helpful for reviewers.]

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[Amruta7203]

@panwar8279 Pls add the gssoc label and level2 label to this. #517

[Amruta7203]

@panwar8279 @HimanshuNarware Pls add the gssoc labels to this merged PR. Thank you. #517

[Amruta7203]

@panwar8279 @HimanshuNarware Pls add the gssoc labels to this merged PR. Thank you. #517