add %pyproject_save_files macro
This macro save generates file section to %pyproject_files. It should
simplify %files section
and allow to build by some automatic machinery
supposed use case:
%install
%pyproject_install
%pyproject_save_files requests _requests
%files -n python3-requests -f %{pyproject_files}
%doc README.rst
%license LICENSE
automatic rebuild of packages:
%install
%pyproject_install
%pyproject_save_files * +bindir // save all modules with executables
%files -n python3-requests -f %{pyproject_files}