✨ Add source examples for docs

docs_src/tutorial/code_structure/tutorial002/app.py

@@ -0,0 +1,30 @@
+from sqlmodel import Session
+
+from .database import create_db_and_tables, engine
+from .hero_model import Hero
+from .team_model import Team
+
+
+def create_heroes():
+    with Session(engine) as session:
+        team_z_force = Team(name="Z-Force", headquarters="Sister Margaret’s Bar")
+
+        hero_deadpond = Hero(
+            name="Deadpond", secret_name="Dive Wilson", team=team_z_force
+        )
+        session.add(hero_deadpond)
+        session.commit()
+
+        session.refresh(hero_deadpond)
+
+        print("Created hero:", hero_deadpond)
+        print("Hero's team:", hero_deadpond.team)
+
+
+def main():
+    create_db_and_tables()
+    create_heroes()
+
+
+if __name__ == "__main__":
+    main()