Add support of the console helpers

[Koc]

It would be nice add such autocompletes:

1. $this->getHelperSet()->get(/*suggest*/)
2. $this->getHelperSet()->get('concrete helper')->/*suggest*/

More information available in the doc http://symfony.com/doc/current/components/console/helpers/index.html

[Haehnchen]

in standard symfony2 we have multiple impl of the Command class, but one doesnt include getHelperSet, so sometimes its not working. need to find a workaround also for returntypes :)

[Koc]

Imho this issue is very low priority.Especially on the agenda that two helpers was deprecated and it classes should be instanciated manually.

[CarsonF]

I would like this! I don't think they are going away just getting renamed. One was even added in 2.6 :)

[Haehnchen]

Haehnchen/idea-php-shopware-plugin#30

[Haehnchen]

still functional in Symfony 7