Added custom scrollbar

[Arbtrage]

Related Issue

• Title: Improve ScrollBar #55

Proposed Changes

• Added a better looking scrollbar
• The scroll bar works in dark mode also

Additional Info

• None

Checklist

• ✅ My code follows the code style of this project.
• 📝 My change requires a change to the documentation.
• 🎀 I have updated the documentation accordingly.
• 🌟 ed the repo

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

     Added a custom scrollbar to make the website look better

    This makes the website look more better

Output Screenshots

Screenshot #1	Screenshot #2
Dark Mode	Light Mode

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[Arbtrage]

@agamjotsingh18 can you please review the changes, if there are any more changes needed to be done regarding this issue I would be happy to do so.