Move PostObserver, AutomationRunObserver, and AutomationNodeRunObserver onto
their models with the #[ObservedBy] attribute (the Laravel-preferred way) and
drop AppServiceProvider::configureObservers() plus its now-unused imports.
- Added new automation-related routes and controllers for managing automations.
- Introduced automation nodes in the UI with distinct styles and interactions.
- Updated sidebar to include navigation for automations.
- Enhanced post creation logic to support automation metadata.
- Refactored content type and platform enums into types for better type safety.
- Added localization for automation-related terms in English, Spanish, and Portuguese.
- Improved error handling in various components to accommodate new features.
