Add csv export arg

src/simstadt/cli.py

@@ -93,6 +93,7 @@ def build_parser() -> argparse.ArgumentParser:
         description="simstadt - Python library for SimStadt workflows.",
     )
     parser.add_argument("--gui", action="store_true", help="Launch the SimStadt GUI.")
+    parser.add_argument("--csv-export", action="store_true", help="Export CSV from workflowsteps, when available.")
     parser.add_argument(
         "--install",
         action="store_true",