fix: don't force Python minor version restriction on abi3 and none tags

Disable Rust toolchain by default

fix: merge PYTHON_PATH defines

chore: bump versions and cut 0.6.1

chore: prepare for v0.6.0 release

feat: use module internal repositories for wheels and sdists

feat: add synthetic target :all

Closes: #100

feat: add compilation of Python packages

feat: update versions

fix: use proper host interpreter in poetry_update and package rules