Add typescript docs

[mindplay-dk]

Motivation

I had a hard time figuring out how to use styled in TypeScript.

Full disclosure: I used AI to help with this. (I had Copilot reference the .d.ts files and type tests, and review all the historical issues related to typing, and I used Claude to generate the examples.)

Every example in this documentation has been manually tested and improved though - so this isn't "slop", but I feel it's always fair to point out that this wasn't hand crafted either. 😊

It answered my questions, so I think this would be helpful to others.

[changeset-bot]

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Latest commit: 194cac5

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