Exercise 2: Converting a PreviewProvider to #Preview — Possible Solution
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TASK
Convert the PreviewProvider example into a #Preview for ProfileCard, and say
what you no longer have to write.

ANSWER

  #Preview {
      ProfileCard()
  }

WHAT YOU NO LONGER WRITE
- A separate struct that conforms to PreviewProvider (for example
  ProfileCard_Previews).
- The static computed property named previews that returns the view.

The chapter's sources say Xcode 15 and Swift 5.9 introduced the #Preview
macro to replace the PreviewProvider protocol.

CAUTION
If ProfileCard needs arguments, pass sample values inside the macro. The
chapter does not describe what happens if it is given none.