lib/tools/notifications/ - foreground, background,local notifications kit;
lib/tools/
network_status_mixin.dart - checks network status;
file_picker_provider.dart - file/image picker with limited size and validation;
snackbar_util.dart - custom snackbar util;
network_error_service.dart - returns status code after responce in Dio package;
unfocus_widget.dart
firebase_error_handler.dart.dart - handles firebase errors;
system_schome_service.dart - sets device orientation/restores the system overlays;
to be continued...