python3Packages.pygobject3: propagate gobject-introspection

Discussion: https://github.com/NixOS/nixpkgs/pull/306080#issuecomment-2081390514

Changed files
+1
pkgs
development
python-modules
pygobject
+1
pkgs/development/python-modules/pygobject/3.nix
···
propagatedBuildInputs = [
pycairo
+
gobject-introspection # e.g. try building: python3Packages.urwid python3Packages.pydbus
];
mesonFlags = [