clan ui: setup typed api method

pkgs/clan-cli/clan_cli/machines/list.py

@@ -5,11 +5,14 @@ from pathlib import Path
 
 from ..cmd import run
 from ..nix import nix_config, nix_eval
+from clan_cli.api import API
 
 log = logging.getLogger(__name__)
 
 
+@API.register
 def list_machines(flake_url: Path | str) -> list[str]:
+    print("list_machines", flake_url)
     config = nix_config()
     system = config["system"]
     cmd = nix_eval(