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]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Apr 1, 2026 4:04am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Apr 1, 2026 4:04am
npmx-lunaria	Ignored		Apr 1, 2026 4:04am

[github-actions]

Hello! Thank you for opening your first PR to npmx, @luxass! 🚀

Here’s what will happen next:

1. Our GitHub bots will run to check your changes.
   If they spot any issues you will see some error messages on this PR.
   Don’t hesitate to ask any questions if you’re not sure what these mean!

2. In a few minutes, you’ll be able to see a preview of your changes on Vercel

3. One or more of our maintainers will take a look and may ask you to make changes.
   We try to be responsive, but don’t worry if this takes a few days.

[codecov]

Codecov Report

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

📢 Thoughts on this report? Let us know!

[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.