Adding Bosnian translation

[dzanahmed]

What changes are proposed in this pull request?
Added Bosnian language translations.

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Hi,

I'm a researcher from Bosnia and Herzegovina, and a longtime fan and user of gtsummary. Thanks @ddsjoberg and all the rest of the team for building and maintaining this awesome package.

Given that I sometimes need to provide outputs in local language, I found myself translating the outputs through some scripts, and then I realised that I can contribute by adding my language to the package, which would be useful for me, and possibly other researchers from the Western Balkans region.

I've followed this pull request: #1302 and gone through the same steps.

Although Bosnian is spoken by some 3 milion people, our language is very similar to Croatian, Serbian and Montenegrin (when combined, this gives about 20 milion speakers worldwide; the languages have different names, but we understand each other 100%).

If the translation needs to be validated by another person - any of native speakers of these languages would be able to do so.

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Reviewer Checklist (if item does not apply, mark is as complete)

• PR branch has pulled the most recent updates from main branch.
• If a bug was fixed, a unit test was added.
• Run pkgdown::build_site(). Check the R console for errors, and review the rendered website.
• Code coverage is suitable for any new functions/features: devtools::test_coverage()
• usethis::use_spell_check() runs with no spelling errors in documentation
• All GitHub Action workflows pass with a ✅

When the branch is ready to be merged into master:

• Update NEWS.md with the changes from this pull request under the heading "# gtsummary (development version)". If there is an issue associated with the pull request, reference it in parentheses at the end update (see NEWS.md for examples).
• Increment the version number using usethis::use_version(which = "dev")
• Run usethis::use_spell_check() again
• Approve Pull Request
• Merge the PR. Please use "Squash and merge".

[ddsjoberg]

Thanks @dzanahmed !

Just an FYI, translation changes take more time to review, and I am not sure exactly when I'll have the bandwidth to review (just to st expectations). But truly appreciate the addition.