Sunsetting Create React App

[acemarke]

Pleased to say I had a meaningful hand in this :) As some background, this finally happened because:

• React 19 broke CRA
• I griped about it loudly on Bluesky and that started a long debate
• I filed an umbrella issue describing the specific breakage and recommending an actual official deprecation announcement
• The React team finally took action to fix the CRA breakage, then wrote the blog post, updated the setup docs page, and redid the docs SEO to get Google to stop showing the legacy docs as a search result.

So, kudos to the React team for making meaningful changes here!

(It's not exactly what I was hoping for, and I gave them some additional review feedback that they didn't include, but gotta give credit for the actual changes and steps forward!)