feat(components): add styled scrollbar (VIV-2214)

[rachelbt]

text-area width changed in chrome - due to scrollbar design - this is why the ui test has updated - the text-area is smaller in 2px

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d61b119) to head (4e75419).
Report is 1180 commits behind head on main.

Additional details and impacted files

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##              main     #2028     +/-   ##
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  Coverage   100.00%   100.00%             
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  Files          123       363    +240     
  Lines         1562      7958   +6396     
  Branches       108      1124   +1016     
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+ Hits          1562      7958   +6396     

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unittests	100.00% <ø> (ø)

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[TaylorJ76]

Why do we have 1 updated snapshot? I can't see what has changed.
Otherwise all good.

[TaylorJ76]

How will the consumers add the scrollbar styles to their applications?
Will this be in a separate PR?

[rachelbt]

Why do we have 1 updated snapshot? I can't see what has changed. Otherwise all good.

#2028 (comment)

[rachelbt]

How will the consumers add the scrollbar styles to their applications? Will this be in a separate PR?

totally forgot about it...
Added it now to the theme.scss. I wonder if this is the right place to add it or its better to create a new file. WDTY?