Update norwegian version of Gitea

[mlqn]

Description

We currently use custom files (locales and templates) to translate Gitea to Norwegian, as Gitea does not have a default Norwegian version (see: https://github.com/go-gitea/gitea/tree/main/options/locale, https://docs.gitea.com/next/contributing/localization). These custom files are not updated with Gitea updates, resulting in outdated files.

Tasks

• [x] Update locale_nb-NO.ini using https://crowdin.com/project/gitea/no:
  • [x] Remove old keys
  • [x] Add new keys
  • [x] Update texts of existing keys
• [x] Update templates using https://github.com/go-gitea/gitea/tree/main/templates

[framitdavid]

We should implement a test that verifies changes from gitea compared to our local file.