i18n - Replace all plaintext with english translation files

[bbovenzi]

Body

Finish the foundation for i18n of the UI by migrating all plaintext to english translations in json.

Add linting to make sure we don't add any plain text in the UI in the future: https://www.npmjs.com/package/eslint-plugin-i18next

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[RoyLee1224]

Hi @bbovenzi

I've tried to implement the i18n linting rule in my fork

I wanted to double-check if this is the direction you had in mind. I've set the i18next/no-literal-string rule to WARN to avoid disrupting the development workflow.

Here is a screenshot of how the warning appears in the editor if there is plaintext:

Please let me know your thoughts. I'm happy to adjust the implementation.

[bbovenzi]

Yes, let's start with warn and then we can upgrade it to error once everything has been migrated

[jscheffl]

FYI - I'd start to walk over "components"
(means... is a lot of "cluttered" work, I am walking over all stuff in airflow-core/src/airflow/ui/src/components atm, stay tuned... will take some more hours)