- add python modules for qemu protocols: QMP (hardware interactions) and QGA (guest service interaction)
- refactor state directory: remove name from path (already contains url)
- add impure vm test for basic qmp interaction
- simplify existing vm persistance test (factor out shared code)
- integrate graceful shutdown into GUI
the GUI integration still needs to be improved later:
- add fallback in case system doesn't react to powerdown button
- shutdown GUI switch fails if VM hasn't been started yet, and then remains in a wrong position
This adds a vm create test for the `clan join` scenario where:
- there is no local clan to write changes to
- a machine from a remote flake needs to be built and run
- no users and no secrets need to be or can be managed (no flake to write files to)
