Add RTL support

We should check how complicated it would be to add support for RTL languages. There should be a context menu enabling RTL support. If I understand it correctly, it would be enough to just right align the text then?

Some examples:

https://leancode.co/blog/right-to-left-in-flutter-app

Maybe we can somehow flip the app horizontally, or better only specific parts of it?

https://stackoverflow.com/questions/43592987/svg-transformation-flip-horizontally

Maybe we should add this feature per element?