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.

accounts/management/commands/setup_site.py

@@ -1,17 +1,16 @@
 from django.core.management.base import BaseCommand
 from django.contrib.sites.models import Site
 
+
 class Command(BaseCommand):
-    help = 'Set up default site'
+    help = "Set up default site"
 
     def handle(self, *args, **options):
         # Delete any existing sites
         Site.objects.all().delete()
-        
+
         # Create default site
         site = Site.objects.create(
-            id=1,
-            domain='localhost:8000',
-            name='ThrillWiki Development'
+            id=1, domain="localhost:8000", name="ThrillWiki Development"
         )
-        self.stdout.write(self.style.SUCCESS(f'Created site: {site.domain}'))
+        self.stdout.write(self.style.SUCCESS(f"Created site: {site.domain}"))