Add convenience launcher script

Theremini/main.py

@@ -12,17 +12,8 @@ from reachy_mini.utils import create_head_pose
 from scamp import Session
 from scipy.spatial.transform import Rotation as R
 
-if __package__ in (None, ""):
-    # Allow running as a standalone script (python main.py) by exposing package root.
-    import sys
-    from pathlib import Path
-
-    sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
-    from Theremini.config import get_active_instruments
-    from Theremini.dashboard import DASHBOARD_PORT, DashboardServer, set_status
-else:
-    from .config import get_active_instruments
-    from .dashboard import DASHBOARD_PORT, DashboardServer, set_status
+from .config import get_active_instruments
+from .dashboard import DASHBOARD_PORT, DashboardServer, set_status
 
 # ────────────────── mapping constants ───────────────────────────────
 ROLL_DEG_RANGE = (-60, 60)  # head roll span

main.py

@@ -0,0 +1,6 @@
+"""Convenience launcher so `python main.py` behaves like `python -m Theremini.main`."""
+
+from runpy import run_module
+
+if __name__ == "__main__":
+    run_module("Theremini.main", run_name="__main__")