Support for data_files (peoblix is not maintained anymore)

[faxm0dem]

Issue Kind

Other

Description

We would like to ship data files (config files, resources) in our packages.
This was possible with setuptools, and lately with the unmainained poeblix (See also #890).

Impact

This would allow many users (see #890) to ship external files with the generated packages.

Workarounds

Today either we can use an older version of poetry with poeblix plugin, or ship data files in a separate package.

[dimbleby]

This is an anti-pattern, explicitly anti-recommended by pypa and deprecated at setuptools. I doubt that poetry should be adding support for this.

Originally #890, more recently #8867