Simple Symfony Console Command object based queue system.

Usage:

1. Add a class implementing the storage interface. This class will be used to get/add items from/to the queue. For example in this class you can use a database driver (mysql or alike) to store the commands.
2. Create the symfony console command class(es).
3. Run the symfony console commands by using a queue implementation. For example src/Commands/Run.php. But also if you like to create your own implementation this code is a good starting point.