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/admin/reference.py

@@ -0,0 +1,18 @@
+from django.contrib import admin
+from unfold.admin import ModelAdmin
+
+from core.apps.evaluation.models import ReferenceitemModel
+
+
+@admin.register(ReferenceitemModel)
+class ReferenceitemAdmin(ModelAdmin):
+    list_display = ("id", "type", "name", "parent", "order", "is_active")
+    list_filter = ("type", "is_active")
+    search_fields = ("name",)
+    list_editable = ("order", "is_active")
+    autocomplete_fields = ("parent",)
+    fieldsets = (
+        (None, {
+            "fields": ("type", "name", "parent", "order", "is_active"),
+        }),
+    )