Optional capstone exercise

[JeremyPike]

Potential optional exercise adding the features suggested at the end of the challenge solution. I think its nice to include as a stretch exercise. If you like and want to include please double check I've got the formatting right as I havn't added an exercise yet :)

[github-actions]

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⏱️ Updated at 2023-12-13 08:43:11 +0000

[tobyhodges]

I really like this, @JeremyPike, and agree that a "stretch goal" challenge is a good thing to include. In general, I hope others will come along and suggest other kinds of capstone challenge as well (there used to be two in an older version of the lesson).