"Styled the Vertical Scrollbar" Matching to "Website Design" theme

[MastanSayyad]

What kind of change does this PR introduce?

Hey @Tanay-ErrorCode

I have added "Style the Vertical Scrollbar" Matching to "Website Design" theme and as you said similar to firefox default scrollbar specially hover effect.

Issue Number:

Fixes #238

Snapshots/Videos:

https://github.com/Tanay-ErrorCode/lupo-skill/assets/101971980/9880b5f0-6c79-4a22-8ab9-d69d89ccf773

Please take a look and review it thank you!

[Tanay-ErrorCode]

@MastanSayyad Good work.