feat: add German translation

[paulbauriegel]

Add German translation

I added a i18n translation file for German, because we want to use Argilla in a setting where people only speak that language. Let me know if that would work like that.

Type of change

• Improvement (change adding some improvement to an existing functionality)

How Has This Been Tested

I only added the i18n translation for German, and checked that the UI works based on the browser setting. Please let me know if there is some test that I would adopt.

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[damianpumar]

Hello @paulbauriegel 👋
Thanks for this contribution.

I'll take a look!

[damianpumar]

Hello again @paulbauriegel
I tested your changes and it works! But we have some UI issues because some words are a bit long.
Here I created a PR to switch language based on the browser language. #4690

Tomorrow we'll improve some UI bugs and we'll merge it.

Many thanks for this amazing contribution and keep improving Argilla together!!

[damianpumar]

Hello @paulbauriegel this morning we pushed one change into develop, now you can try your translation.
Before approve your PR could you please update the CHANGELOG.md

Thanks!

[paulbauriegel]

I tested it again, but I think it might make sense to add a couple more values to the translation js files

[paulbauriegel]

@damianpumar I added most of the changes that are relevant to have the feedback task and major UI elements multi-lingual. I would add the changes for other tasks like Text2Text etc in a second MR to make this one not too big. Changelog is updated if there is anything else Todo let me know.

[damianpumar]

Hi @paulbauriegel you can merge it when you want!

Many thanks for your amazing work!

[paulbauriegel]

@damianpumar I don't have the rights to merge it myself, but please go ahead and merge it :-)