Add project to Nextcloud project on Transifex incl. sync

[rakekniven]

This would enable the app to support about 100 languages.

rakekniven can help here.

[holger-dev]

Awesome idea! 🙌 I totally agree it would be super useful — just need a bit of time to get around to it.

[rakekniven]

There was a mobile cookbook app called "Cookbook".
This app is using flutter and was translated using Transifex.

https://github.com/Teifun2/nextcloud-cookbook-flutter/tree/develop/assets/i18n