Kevin Veen-Birkenbach
389ec40163
Refine Nix dev shell, ensure PyYAML availability, fix Python invocation, and
expose pkgmgr.cli for Python 3.13 compatibility
- Add `.nix-dev-installed` to .gitignore
- Improve flake.nix:
* unify pkgs/pyPkgs definitions
* provide python311.withPackages including pip + PyYAML
* remove unused pkgmgrPkg reference from devShell
* fix PYTHONPATH export and devShell help message
- Update unit/integration test scripts to use `python3 -m unittest`
- Add top-level pkgmgr.__init__ exposing `cli` attribute for
pkgutil.resolve_name compatibility under Python 3.13+