add russian translation

[missytake]

Can a native speaker take a second look at this?

Also I'm not sure if the localization scheme works at all right now, switching chromium to french already doesn't work for me on main branch, I still see the english text. But tests pass, and updating i18next.js doesn't change anything, so maybe it's fine?

related: #39

[missytake]

@iequidoo Now that it's deployed, can you confirm whether the translation is shown for you?

[iequidoo]

i.delta.chat still says "Say hello to iequidoo" while https://delta.chat brings me to https://delta.chat/ru/. FF 115.10.0esr

[rosano]

I'm not sure if it was redirecting before, but I thought it would at least check for preferred language. I can access French https://i.delta.chat/?lang=fr and Russian https://i.delta.chat/?lang=ru with a query parameter.

[iequidoo]

Yes, i tried to change my preferred language in FF, but that didn't help for http://i.delta.chat. But if i add ?lang=ru, it works and looks good.

EDIT: Now it works if i change my preferred language, but it looks that FF caches smth so i need to open a "New private window". Not that important i think.

[link2xt]

Language gets stored into "local storage" by this i18next library.