Deck - new component group #825

The primary use case for this is that it'd be placed in a modal to implement patterns like the following:
https://www.figma.com/design/lJ5s1z11E4Q2Bp6kD3TE0W/Red-Hat-Genie---MVP?node-id=837-21878&m=dev

Deck is a compact, sequential container for presenting a suite of static announcements or an informational walkthrough, and is not intended for task completion or form-filling workflows.