New style python-brace-format translations

[sassanh]

Can we have support for python-brace-format translations?

[akx]

This seems related to #35, #80.
Also of interest: https://github.com/nijel/weblate/issues/345

[sassanh]

It may be related but not included in those issues.

[septatrix]

Any progress on this? Would you also consider adding this to babel 2 already if one would create a PR? Even GNU xgettext supports string tagged with f"..."...

[stianjensen]

This would still be great to have, to be able to statically and safely lint that translations actually use format placeholders correctly. I see that a PR is open to start getting support for this now, but the project is perhaps currently lacking active maintainers to review it?