add machine subcommand

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

@@ -0,0 +1,13 @@
+import argparse
+
+from .folders import machine_folder
+
+
+def create_command(args: argparse.Namespace) -> None:
+    folder = machine_folder(args.host)
+    folder.mkdir(parents=True, exist_ok=True)
+
+
+def register_create_parser(parser: argparse.ArgumentParser) -> None:
+    parser.add_argument("host", type=str)
+    parser.set_defaults(func=create_command)