fix: update license syntax in `pyproject.toml`

rest of 2.0

update tool for newer sops, drop ssh-to-age, drop ssh host support, more robust refresh-secrets

fix arg parsing

install-binaries to install prereqs

huge dev ux improvements

fix: 1 not specifying key type, 2 use more powerful user-listing api

fix multiple keys per user

Updated README to reflect v1.1.4:

updated setuptools custom discovery