Card compound pattern

[mwarman]

Describe the story

Provide a clear description of the new feature or improvement to existing functionality.

Update the Card component to utilize the compound pattern.

The sub-components which are used to compose an implementation of a card, Header, Title, Subtitle, Content, Footer, may be made properties of the Card component.

Use the shadcn/ui Card component as a reference.

Acceptance criteria

Provide clear acceptance criteria to validate the story is complete.

GIVEN the Card component implements the compound pattern
WHEN an instance of Card is created
THEN the sub-components are internal to Card, i.e. not exported

Additional context

Add any other context about the story here.