Add python-crypt_r PKGBUILD to provide the crypt module removed in Python 3.13 (PEP 594), required by pyanaconda/core/users.py for password hashing.
Add python-legacy-cgi for the cgi module also removed in Python 3.13, required by python-requests-ftp imported by pyanaconda/core/util.py.
Add ostree to provide the OSTree-1.0 GI namespace required by pyanaconda/rescue.py for the rpm_ostree payload.
Add libblockdev LVM CLI mode configuration to avoid DBus dependency issues with lvmdbusd unavailable in Arch.
Update setup-aur.sh to include python-crypt_r in the local build order before python-meh.
