✨ Feature: Use shiki-twoslash on articles

[JoshuaKGoldberg]

Feature Request Checklist

• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the feature I would like to request.

Feature

It's a great system and I want to be able to highlight types of values.

Additional Info

https://shikijs.github.io/twoslash/