[devctl] make i18n custom message extractors work with legacy layouts
distname needs to be "cubicweb_<cubename>", even with legacy layouts
for pkg.load_entry_point() to work
closes #16272177
.. _appobject_module:
:mod:`cubicweb.appobject`
=========================
.. automodule:: cubicweb.appobject
.. autoclass:: AppObject
:show-inheritance:
:members: