[ADD] python-vcs-versioning, the half setuptools-scm lost

from vcs_versioning import Configuration
  ModuleNotFoundError: No module named vcs_versioning

setuptools-scm was split upstream and its own build imports the half that left.
The traceback runs through setuptools build_meta, so what the log showed for
several passes was

  ERROR Backend subprocess exited when trying to invoke build_wheel

a backend complaint about a package that had been divided in two. Fifth Python
build-time package this port has had to add, after flit_core, setuptools,
poetry-core and hatchling.

--- FR ---

  from vcs_versioning import Configuration
  ModuleNotFoundError: No module named vcs_versioning

setuptools-scm a ete scinde en amont, et sa propre construction importe la moitie
partie. La trace passe par build_meta de setuptools : ce que le journal montrait
depuis plusieurs passes etait

  ERROR Backend subprocess exited when trying to invoke build_wheel

une plainte de moteur au sujet d un paquet coupe en deux. Cinquieme paquet Python
de construction que ce portage doit ajouter, apres flit_core, setuptools,
poetry-core et hatchling.

Assisted-by: Claude Opus 5

scripts/packages.sh

@@ -319,6 +319,16 @@ STAGE1_PACKAGES=(
     # flit_core, setuptools, hatchling and now poetry-core -- each package picks
     # its own, and each one has to exist before that package can be built.
     python-poetry-core
+    # python-vcs-versioning: setuptools-scm was split, and its own build now
+    # imports the half that left:
+    #
+    #   from vcs_versioning import Configuration
+    #   ModuleNotFoundError: No module named 'vcs_versioning'
+    #
+    # The traceback runs through setuptools' build_meta, so the visible error is
+    # "Backend subprocess exited when trying to invoke build_wheel" -- a backend
+    # complaint about a package that split upstream.
+    python-vcs-versioning
     # libaio: a real closure gap. lvm2 stops on
     #
     #   device/bcache.c:30:10: fatal error: libaio.h: No such file or directory