Add German Locale support

[burghoffdavid]

Hi, I've added German locale support for GitBook.

Link to Diskussion: https://github.com/orgs/GitbookIO/discussions/537

[burghoffdavid]

@addisonschultz

[thebiglabasky]

Looks good, thanks!
I made a comment but don't trust my German enough to consider that a must :)

[burghoffdavid]

I just noticed that I did not import the new locale file inside src/intl/translations/index.ts to add it to the languages var. Should this be added with this PR or will it be added further down the line by the team?

[addisonschultz]

@burghoffdavid Could you please add the translation import in? Thank you!

[burghoffdavid]

@addisonschultz Done ✔️

[burghoffdavid]

@addisonschultz Not entirely sure why the typecheck CI is failing, any ideas?

[addisonschultz]

@burghoffdavid yep - I've got to add these types to our backend schema - working on that now 😄

[addisonschultz]

Hi @burghoffdavid - first off, I want to apologize for the delays on getting this PR up and live so slowly - it's brought to my attention a lot of workflow improvements we need to make on our end in order to make this a lot more smooth.

Secondly, I wanted to let you know that your contribution is now live in GitBook!

You can now update the locale to German - let me know if you have any questions!