Generate a PhpStorm advanced metadata file for Core::make() auto-completion

Running `grunt generate-metadata` will create a file for PhpStorm that helps PhpStorm analyze Core::make() calls.

For example, if you run `$iph = Core::make('helper/validation/ip');` PhpStorm will know without needing an `@var` comment that $iph has an instance of \Concrete\Core\Permission\IPService.