Add German translations to make it available across Admin.

[kaio-donadelli]

What problem is this solving?

This is part of a series of PRs in several apps to make German available accross the Admin. Tracked in task LOC-9843.

How to test it?

A test store with DE in the language switcher is available here.

[vtex-io-docs-bot[bot]]

Beep boop :robot:

I noticed you didn't make any changes at the docs/ folder

• [x] There's nothing new to document :thinking:
• [ ] I'll do it later :disappointed:

In order to keep track, I'll create an issue if you decide now is not a good time

• [ ] I just updated :tada::tada:

[vtex-io-docs-bot[bot]]

Beep boop :robot:

I noticed you didn't make any changes at the docs/ folder

• [x] There's nothing new to document :thinking:
• [ ] I'll do it later :disappointed:

In order to keep track, I'll create an issue if you decide now is not a good time

• [ ] I just updated :tada::tada: