Implement teams in own file

backend/app/tests/utils/team.py

@@ -0,0 +1,18 @@
+from sqlmodel import Session
+
+from app.models.event import Event
+from app.models.team import Team, TeamCreate
+
+from app.tests.utils.event import create_random_event
+from app.tests.utils.utils import random_lower_string
+
+
+def create_random_team(db: Session, event: Event | None = None) -> Team:
+    name = random_lower_string()
+
+    if not event:
+        event = create_random_event(db)
+
+    team_in = TeamCreate(theme_name=name, event_id=event.id)
+    team = Team.create(session=db, create_obj=team_in)
+    return team