Account backup and restore

.gitignore

App/NotificationExtension/NotificationService.swift

App/client-ios.xcodeproj/project.pbxproj

App/client-ios/Resources/GoogleService-Info.plist

App/client-ios/Resources/Info.plist

App/client-ios/Resources/client-ios.entitlements

Package.swift

Sources/App/AppDelegate.swift

Sources/App/DependencyRegistrator.swift

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

Sources/BackupFeature/Controllers/BackupController.swift

...ces/BackupFeature/Controllers/BackupSetupController.swift

Sources/BackupFeature/Coordinator/BackupCoordinator.swift

Sources/BackupFeature/Service/BackupService.swift

Sources/BackupFeature/ViewModels/BackupConfigViewModel.swift

Sources/BackupFeature/ViewModels/BackupSetupViewModel.swift

Sources/BackupFeature/ViewModels/BackupViewModel.swift

Sources/BackupFeature/Views/BackupActionView.swift

Sources/BackupFeature/Views/BackupConfigView.swift

Sources/BackupFeature/Views/BackupDetailView.swift