feat: add ReferenceItem model and update QuickEvaluation FKs

- Create ReferenceitemModel with type, name, parent (self FK), order, is_active fields
- Add ReferenceType choices: brand, marka, color, fuel_type, body_type, car_position, state_car
- Implement ReferenceItem API (list, retrieve) with filter by type/parent/is_active, search, ordering
- Add ReferenceItem admin with list_filter, search, inline editing
- Change QuickEvaluation FK fields from shared.OptionsModel to evaluation.ReferenceitemModel
- Update serializers and views to use .name instead of .key
- Add ReferenceItem to unfold admin navigation

core/apps/evaluation/signals/reference.py

@@ -0,0 +1,8 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from core.apps.evaluation.models import ReferenceitemModel
+
+
+@receiver(post_save, sender=ReferenceitemModel)
+def ReferenceitemSignal(sender, instance, created, **kwargs): ...