Add operators and property owners functionality

- Implemented OperatorListView and OperatorDetailView for managing operators.
- Created corresponding templates for operator listing and detail views.
- Added PropertyOwnerListView and PropertyOwnerDetailView for managing property owners.
- Developed templates for property owner listing and detail views.
- Established relationships between parks and operators, and parks and property owners in the models.
- Created migrations to reflect the new relationships and fields in the database.
- Added admin interfaces for PropertyOwner management.
- Implemented tests for operators and property owners.

rides/models.py

@@ -2,6 +2,7 @@ from django.db import models
 from django.utils.text import slugify
 from django.contrib.contenttypes.fields import GenericRelation
 from history_tracking.models import TrackedModel, DiffMixin
+from manufacturers.models import Manufacturer
 from .events import get_ride_display_changes, get_ride_model_display_changes
 
 # Shared choices that will be used by multiple models
@@ -109,7 +110,7 @@ class RideModel(TrackedModel):
     """
     name = models.CharField(max_length=255)
     manufacturer = models.ForeignKey(
-        'companies.Manufacturer',
+        Manufacturer,
         on_delete=models.SET_NULL,
         related_name='ride_models',
         null=True,
@@ -171,10 +172,11 @@ class Ride(TrackedModel):
         blank=True
     )
     manufacturer = models.ForeignKey(
-        'companies.Manufacturer', 
-        on_delete=models.CASCADE, 
-        null=True, 
-        blank=True
+        Manufacturer,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name='rides'
     )
     designer = models.ForeignKey(
         'designers.Designer',