Remove item management feature from frontend and backend, and add a pending skeleton component.

backend/tests/conftest.py

@@ -7,7 +7,7 @@ from sqlmodel import Session, delete
 from app.core.config import settings
 from app.core.db import engine, init_db
 from app.main import app
-from app.models import Item, Location, User
+from app.models import Location, User
 from tests.utils.user import authentication_token_from_email
 from tests.utils.utils import get_superuser_token_headers
 
@@ -17,8 +17,6 @@ def db() -> Generator[Session, None, None]:
     with Session(engine) as session:
         init_db(session)
         yield session
-        statement = delete(Item)
-        session.execute(statement)
         statement = delete(Location)
         session.execute(statement)
         statement = delete(User)