Get stack info from CLI

Description of the feature request

Use case / for what or how I would use it

We publish IPA with Bitrise workflow.
And “default stack” is set in that workflow.

So we developers had better use the same version of Xcode as the default stack.
But sometimes…we get confused “Now, Which Xcode version do we use??”.
We can make sure in Bitrise Console, But in my team, many developers including designers use Xcode.
So if there would be like bot which tells us the default stack info, it would be nice.
This is my motivation.