Minor: better indentation of recipe install command output

[robbieaverill]

Super minor, but it might look a bit nicer if the output of the recipe plugin/vendor plugins were indented further than they are to form more of a tree

[maxime-rainville]

Since this plugin is run through composer, should we not try to match the composer output as much as possible? So if we display a list of items, we should try to display it the same way composer a list of items.