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.

tests/test_runner.py

@@ -69,16 +69,11 @@ class CustomTestRunner(DiscoverRunner):
         # Create necessary content types
         from django.contrib.contenttypes.models import ContentType
         from parks.models import Park
-        from companies.models import Company
         
         ContentType.objects.get_or_create(
             app_label='parks',
             model='park'
         )
-        ContentType.objects.get_or_create(
-            app_label='companies',
-            model='company'
-        )
         
         return old_config