Using SFTP on both backup and restore flows

Sources/App/DependencyRegistrator.swift

...es/BackupFeature/Controllers/BackupConfigController.swift

Sources/BackupFeature/Controllers/BackupSFTPController.swift

Sources/BackupFeature/Coordinator/BackupCoordinator.swift

Sources/BackupFeature/Service/BackupService.swift

Sources/BackupFeature/ViewModels/BackupSFTPViewModel.swift

Sources/BackupFeature/Views/BackupSFTPView.swift

...es/RestoreFeature/Controllers/RestoreListController.swift

...es/RestoreFeature/Controllers/RestoreSFTPController.swift

Sources/RestoreFeature/Coordinator/RestoreCoordinator.swift

Sources/RestoreFeature/ViewModels/RestoreListViewModel.swift

Sources/RestoreFeature/ViewModels/RestoreSFTPViewModel.swift

Sources/RestoreFeature/ViewModels/RestoreViewModel.swift

Sources/RestoreFeature/Views/RestoreSFTPView.swift

Sources/SFTPFeature/SFTPService.swift