fix(marimo#oso): add marimo import to boilerplate

Author: Jabolol

marimo/oso/__init__.py

@@ -34,6 +34,7 @@ def enable_debug_logging() -> None:
 # This code sets up pyoso to be used as a database provider for this notebook
 # This code is autogenerated. Modification could lead to unexpected results :)
 import pyoso
+import marimo as mo
 pyoso_db_conn = pyoso.Client().dbapi_connection()
 """.strip()