[entity] Reimplement and deprecate entity.cw_metainformation
It shouldn't rely anymore on cnx.entity_metas which is itself deprecated, and
the cw_metainformation API is similarly not needed anymore, access directly to
cwuri / cw_source if needed.
Related to #15538288
include *.py
include */*.py
recursive-include cubicweb_%(cubename)s *.py
recursive-include cubicweb_%(cubename)s/data *.gif *.png *.ico *.css *.js
recursive-include cubicweb_%(cubename)s/i18n *.po
recursive-include cubicweb_%(cubename)s/wdoc *
recursive-include test/data bootstrap_cubes *.py
include tox.ini
recursive-include debian changelog compat control copyright rules
include cubicweb-%(cubename)s.spec