Packaging details

This (pre-)release only settles some fine details of packaging. For now, it seems that the lightning.kokkos simulator package required by the pennylane-catalyst wheel for Ubuntu Focal Fossa distribution series (20.04 LTS) builds from source distribution, but it fails to build.

sha1sum results:
3e8966858250e2cb54335ab6199ba936c8628619 pennylane_qrack-0.6.12-cp310-cp310-manylinux_2_35_x86_64.whl
768ae5a9d56f93f480cc96858010219c663a3822 pennylane_qrack-0.6.12-cp312-cp312-macosx_14_0_arm64.whl
c0e5874d131b7450d83c41a46dcedec5fc092145 pennylane_qrack-0.6.12-cp312-cp312-manylinux_2_39_x86_64.whl
cf06e65b538dcc9e281102286d6cf751aaca2d05 pennylane_qrack-0.6.12-py3-none-win_amd64.whl
63d6a677feeafac1c5cce0599e91c0922a2242cb pennylane_qrack-0.6.12.tar.gz