- Implemented email notification functionality in the NotificationService.
- Added support for rendering email templates based on event types.
- Created HTML templates for various notification types (security alerts, SSL events, uptime events, and system events).
- Updated the dispatchEmail method to utilize the new email templates.
- Added tests for email template rendering and fallback mechanisms.
- Enhanced documentation to include email notification setup and usage instructions.
- Introduced end-to-end tests for the email notification provider in the settings.