feat(scrollbar): implement scrollbar

[x] Documentation (updates to the documentation, readme or JSDoc annotations)
[ ] Bug fix (a non-breaking change that fixes an issue)
[ ] Enhancement (improving an existing functionality like performance)
[x] New feature (a non-breaking change that adds functionality)
[ ] Refactoring (old API is revised and supported)
[ ] Chore (updates to the build process or auxiliary tools and libraries)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

implement scrollbar

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