Add comprehensive HIPAA compliance features and OTP-based authentication:
- Configure HIPAA email settings with AES-256 encryption standard
- Add secure portal URL and BAA verification configuration
- Implement OTP verification for user registration and password reset
- Add user model fields for email verification and password reset OTPs
- Configure templates directory in Django settings
- Add authentication flow endpoints with detailed documentation
- Update dependencies to support new security features
- Reorganize .gitignore for better structure
These changes ensure HIPAA compliance for healthcare data handling
with 6-year audit retention, secure email communications, and
multi-factor authentication capabilities.
