on_delete should be required

Is your feature request related to a problem? Please describe.
I encountered that when declaring ForeignKeyField on_delete = CASCADE, I believe that this is dangerous and in some scenarios may lead to undesirable consequences.

def ForeignKeyField(
    model_name: str,
    related_name: Union[Optional[str], Literal[False]] = None,
    on_delete: OnDelete = CASCADE,
    db_constraint: bool = True,
    null: bool = False,
    **kwargs: Any,
) -> "ForeignKeyRelation[MODEL] | ForeignKeyNullableRelation[MODEL]":

Describe the solution you'd like
The best solution would be to make on_delete a mandatory parameter, I believe that actions with data should be explicit.

def ForeignKeyField(
    model_name: str,
    on_delete: OnDelete,
    related_name: Union[Optional[str], Literal[False]] = None,
    db_constraint: bool = True,
    null: bool = False,
    **kwargs: Any,
) -> "ForeignKeyRelation[MODEL] | ForeignKeyNullableRelation[MODEL]":

Start by locating the ForeignKeyField declaration and reviewing its call sites across the repository. Check how the current default on_delete is documented and tested, then determine the affected usage and update coverage needed when the parameter becomes mandatory.