feat(i18n): implement danish translations

[luxass]

🧭 Context

This adds danish translations.

Some words stays the same, because we either don't have a word for it, or that it makes better sense to keep it as-is.

• README -> README

📚 Description

This PR adds danish translations to the list of available translations.

I made use of AI for some of the translation keys, since it made the entire process faster. I manually reviewed the sentences afterwards, by navigating to each page and read the text.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Mar 31, 2026 7:45pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Mar 31, 2026 7:45pm
npmx-lunaria	Ignored		Mar 31, 2026 7:45pm

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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[jhroemer]

Nice to see @luxass - I'd be happy to review. But since it's still a draft I'll hold off a bit. Feel free to ping me when you're ready.