[Neos] kickstarter to --dev

[Visay Keo]

> Well, yes and no. The neos-kickstarter is the base for the "create site” step in the setup wizard. And that is rather “user focused”.

I think it's "developer focused". A user/admin who wants to install the 
site on production server or on another test server just to see the site 
without changing the code, he/she would do `composer install --no-dev`, 
therefore `neos-kickstarter` package is not needed.

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