feat(Stepper): Add vertical orientation for `Stepper`.

[nikitaorliak-cengage]

Issue: #1208

What I did

Add vertical orientation for Stepper.

Screenshots:

Checklist

• [x] changeset has been added
• [x] Pull request description is descriptive
• [x] I have made corresponding changes to the documentation
• [x] New and existing unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works

How to test

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🦋 Changeset detected

Latest commit: 5d30116a3fe91f31e90e3c15e9898807650b2df0

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