Add tests and stories to Tabs component

[arkadiuszbachorski]

Add tests and stories to Tabs component

⚙️ Release Notes

• Add tests and stories to Tabs component

Closes #23

Code of Conduct & Contributing Guidelines

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• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 88.52459% with 7 lines in your changes missing coverage. Please review.

Project coverage is 30.01%. Comparing base (5fad08e) to head (298f9c1).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
routes/~_dashboard/patients/$id/~index.tsx	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
+ Coverage   25.13%   30.01%   +4.89%     
==========================================
  Files         214      188      -26     
  Lines        7356     6572     -784     
  Branches      352      330      -22     
==========================================
+ Hits         1848     1972     +124     
+ Misses       5387     4512     -875     
+ Partials      121       88      -33     

Files with missing lines	Coverage Δ
...s/design-system/src/components/Tabs/Tabs.mocks.tsx	100.00% <100.00%> (ø)
...ackages/design-system/src/components/Tabs/Tabs.tsx	100.00% <100.00%> (+100.00%)	⬆️
routes/~_dashboard/patients/$id/~index.tsx	0.00% <0.00%> (ø)

... and 32 files with indirect coverage changes

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