- Replaced `Order.PaymentMethod` options with "cash" and "card" while adjusting related code and templates
- Set "cash" as the default payment method for orders and checkout forms
- Added profile editing functionality with `ProfileForm`, allowing users to update names
- Improved feedback messages across profile and order management templates
- Updated catalog to handle empty filter results with a "reset filters" option
- Added email templates for activation and password reset (`activation_email.html`, `password_reset_email.html`, etc.)
- Created forms for registration (`RegisterForm`) and login (`LoginForm`) with custom validation
- Developed new pages for account activation (`activation_success.html`, `activation_invalid.html`), password reset workflow, and profile
- Configured email backend and environment file handling in settings
- Updated header template to conditionally display profile or login links based on authentication status
- Enhanced CSS styles for authentication-related pages and forms
- Добавлены views, URL и страницы для входа, регистрации, профиля
- Обновлён основной маршрут users/urls.py
- Перенаправлен маршрут catalog вместо items
- Обновлена структура header с добавлением ссылки на главную
- Создан Dockerfile и workflow для сборки и доставки образов
