ci: only attempt to distribute whl files

ci: use maturin v1.4.0 to avoid Metadata 2.3 issues with PyPI

ci: copy files to dist (make directory first)

ci: copy files to dist

ci: use checkout@v4, setup-python@v5

ci: upload using whl arch name, too

publish: use v4 of both upload/download actions

fix universal2 builds

fix workflow