Add basic infrastructure for custom webhook notifications:
- Create webhook_notification_settings table with event toggles
- Add WebhookNotificationSettings model with encrypted URL
- Integrate webhook settings into Team model and HasNotificationSettings trait
- Create Livewire component and Blade view for webhook configuration
- Add webhook navigation route and UI
This provides the foundation for sending webhook notifications to custom HTTP/HTTPS endpoints when events occur in Coolify.
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Co-Authored-By: Claude <noreply@anthropic.com>
