docs: expand and polish documentation site

[developit]

Summary

• polish docs styling with Inter font, gradients, and wider layout
• expand Home, Getting Started, and API pages with real guidance and code samples
• add a dedicated Guides section for routing, hydration, and prerendering

Testing

• npm run build (in docs)
• npm test (fails: The CHROME_PATH environment variable must be set to a Chrome/Chromium executable)

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https://chatgpt.com/codex/tasks/task_e_68b5f182eabc8321b1c1639b146c9e69

[rschristian]

Hm, none of this is unique or new, and if anything, it just strips back on the information provided in the ReadMe rather considerably? We also already have the docs mirrored to the preact site with a workable ToC and searching mechanism which will be far more accessible to folks than deploying some light demo separately.

I don't quite see what's the point of this, as-is, and would really like to avoid AI-generated PRs...

[developit]

Lol yeah sorry this was just a test.