Finish i18n initial integration

[roll]

• fixes Implement language button and finish i18n #651
• translates menu
• adds missing translations
• adds translation automation

---

@romicolman
A next step would be creating a follow-up issue that covers:

• language persistence
• language detection from the system settings
• testing not in English and catching all the missing translations (might be a separate one)

[guergana]

@roll when i was trying to implement this, I had the same e2e test error. if you are testing locally with the web app or even with make preview it doesn't mean the app build is working. Please test that the proper build is working.

I just checked and the local build in Linux looks great and the translations work perfectly... I noticed the error report translations are missing, but this we knew already, but this line here is also missing: https://github.com/okfn/opendataeditor/blob/main/client/components/Views/Report/Table.tsx#L30 where it says 'Row number', could you add this translation?

[cloudflare-workers-and-pages]

Deploying opendataeditor with    Cloudflare Pages

Latest commit:	eb70669
Status:	✅  Deploy successful!
Preview URL:	https://39534b8d.opendataeditor.pages.dev
Branch Preview URL:	https://651-finish-i18n.opendataeditor.pages.dev

View logs

[romicolman]

Hi Evgeny!! It looks great! Just one small comment. Is it possible to remove the text "language" at the top of the bottom (if this is not pre-defined, of course).

I think it would be better so that all text from features there are the same. Again, if this is not possible, let's merge it.

I checked dialogs, buttons and everything looks OK.

[roll]

@romicolman
Thanks!

Let's discuss the label on the planning. It might be better to keep it because I think it's a requirement regarding accessibility that all the input have to have corresponding labels.

[romicolman]

Ok, perfect! Let's merge it for now :)