feat(locale): add Swedish(sv) counties

[johanholmerin]

Based on the list at https://sv.wikipedia.org/wiki/Sveriges_l%C3%A4n#Lista_%C3%B6ver_Sveriges_l%C3%A4n

Note: although län is the administrative area that translates to counties, it would also be useful to have support for municipalities(kommuner), since that's whats used for addresses in Sweden.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.96%. Comparing base (a5a6c5b) to head (826dfcd).
Report is 1 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #3154      +/-   ##
==========================================
- Coverage   99.96%   99.96%   -0.01%     
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  Files        2796     2797       +1     
  Lines      227483   227777     +294     
  Branches      953      958       +5     
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+ Hits       227410   227702     +292     
- Misses         73       75       +2     

Files with missing lines	Coverage Δ
src/locales/sv/location/county.ts	100.00% <100.00%> (ø)
src/locales/sv/location/index.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[matthewmayer]

Generally state() returns the "level 1 administrative areas" and county() returns the "level 2 administrative areas" regardless of what they are actually called in that language.

Does that make sense for sv?

[johanholmerin]

Thanks @matthewmayer, that helped make things clearer. I've switched to using municipalities(kommuner) instead(based on the official list at https://skr.se/skr/tjanster/kommunerochregioner/kommunerlista.1246.html). The län were already available as state().