tests: generalize secret cli parser to work for all cli commands

pkgs/clan-cli/tests/helpers/cli.py

@@ -0,0 +1,14 @@
+import argparse
+
+from clan_cli import create_parser
+
+
+class Cli:
+    def __init__(self) -> None:
+        self.parser = create_parser(prog="clan")
+
+    def run(self, args: list[str]) -> argparse.Namespace:
+        parsed = self.parser.parse_args(args)
+        if hasattr(parsed, "func"):
+            parsed.func(parsed)
+        return parsed