QueueMessageHandler Generator command

[KinaneD]

This command should be a new command dedicated for generating the Handler class.

The overall process would be like:

1. Define queue in ./Messaging/queues.php
2. Generale Handler class in ./Messaging/Handlers/*.php
3. Implement the BowlerExceptionHandler
4. Run the consumer

Allow the user to generate the messageHandler class with all its required properties and methods:

• private consumer.
• public handle($msg)`
• public handleError($e, $msg)
• public setConsumer($consumer)`

Generating the handler will reduce the chances of missing required methods and/or properties.

ps: something similar to how lucid generate jobs, features, etc.