v3.15.0a8
gh-134160: Split extension module init from PyModule docs; emphasize multi-phase init (GH-135126)
gh-134160: Use multi-phase init in documentation examples (#134296)
Docs: remove unneeded author attributions (#145002)
gh-146636: Py_mod_abi mandatory for modules created from slots array (GH-146855)
gh-134160: Start "Extending and embedding" with a Diataxis-style tutorial (GH-142314)
gh-134786: raise error if `Py_TPFLAGS_MANAGED_WEAKREF` or `Py_TPFLAGS_MANAGED_DICT` is used without `Py_TPFLAGS_HAVE_GC` set (#135863)