vms: init graceful shutdown for GUI

- 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

pkgs/clan-cli/clan_cli/flakes/inspect.py

@@ -50,10 +50,7 @@ def inspect_flake(flake_url: str | Path, machine_name: str) -> FlakeConfig:
 
     # Make symlink to gcroots from vm.machine_icon
     if vm.machine_icon:
-        gcroot_icon: Path = (
-            machine_gcroot(clan_name=vm.clan_name, flake_url=str(flake_url))
-            / vm.machine_name
-        )
+        gcroot_icon: Path = machine_gcroot(flake_url=str(flake_url)) / vm.machine_name
         nix_add_to_gcroots(vm.machine_icon, gcroot_icon)
 
     # Get the cLAN name
@@ -83,7 +80,7 @@ def inspect_flake(flake_url: str | Path, machine_name: str) -> FlakeConfig:
             [
                 f'{flake_url}#clanInternals.machines."{system}"."{machine_name}".config.clanCore.clanIcon'
             ],
-            machine_gcroot(clan_name=clan_name, flake_url=str(flake_url)) / "clanIcon",
+            machine_gcroot(flake_url=str(flake_url)) / "clanIcon",
         )
         run_cmd(cmd)