* add migrations
* add setting to choose which importers to use
* bump filament
* enable database notifications
* add AirportImporter and AirportExporter
* move the untrash code to beforeUpdate
* fix validation rules
* add AircraftImporter and AircraftExporter
* fix phpstan
* add ExpenseImporter and ExpenseExporter
* add FareImporter and FareExporter
* add FlightImporter and FlightExporter
* add SubfleetImporter and SubfleetExporter
* change how relationships are processed in FlightImporter
* restore records if they are trashed after import
* phpstan and types
* fix packages
* remove foreign keys
* apply some of the fixes suggested by CodeRabbit
* fix docstring
* re add the fk
* bump filament
