Description:

Generates a Command, an Event and adds it to the CommandProcessor or creates one.

Example:

rails generate disco:command CreateThing attr1 attr2 --event=CreatedThing --processor=Thing

This will create:
    app/commands/create_thing_command.rb
    app/events/created_thing_event.rb
    domain/command_processors/thing_processor.rb unless it exists
    Adds a command handler to this or an existing processor