Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

rides/park_urls.py

@@ -7,35 +7,16 @@ urlpatterns = [
     # Park-specific list views
     path("", views.RideListView.as_view(), name="ride_list"),
     path("create/", views.RideCreateView.as_view(), name="ride_create"),
-    
     # Park-specific detail views
-    path(
-        "<slug:ride_slug>/",
-        views.RideDetailView.as_view(),
-        name="ride_detail"
-    ),
+    path("<slug:ride_slug>/", views.RideDetailView.as_view(), name="ride_detail"),
     path(
         "<slug:ride_slug>/update/",
         views.RideUpdateView.as_view(),
-        name="ride_update"
+        name="ride_update",
     ),
-    path(
-        "search/companies/",
-        views.search_companies,
-        name="search_companies"
-    ),
-    
+    path("search/companies/", views.search_companies, name="search_companies"),
     # Search endpoints
-    path(
-        "search/models/", 
-        views.search_ride_models, 
-        name="search_ride_models"
-    ),
-    
+    path("search/models/", views.search_ride_models, name="search_ride_models"),
     # HTMX endpoints
-    path(
-        "coaster-fields/", 
-        views.show_coaster_fields, 
-        name="coaster_fields"
-    ),
-]
+    path("coaster-fields/", views.show_coaster_fields, name="coaster_fields"),
+]