docs: Add @scalar/hono-api-reference to the OpenAPI guide

[hanspagel]

This PR adds @scalar/hono-api-reference as an alternative to the OpenAPI guide.

Looking forward to your feedback on this!

In love with Hono! ❤️‍🔥

[hanspagel]

Maybe it’s too prominent, though. Let me know If I should make it more clear it’s a community middleware or whatever. I’d love to iterate on it! ✌️

[yusukebe]

I'm planning to move the OpenAPI section to a different area. So please stay tuned!

[hanspagel]

Hey, I saw you removed it from the website and just point to the README.

Just wanted to say I think it’s great to have a dedicated guide on the website (even if it doesn’t mention our API reference 😅). I’ve written a few hundred pages of tech docs for my packages already. If you’d like me to write a guide on Zod OpenAPI Hono for the website, you’ll find my contact in the GitHub profile: https://github.com/hanspagel I’d love to contribute this. ✌️

Anyway, closing this here. Thanks, @yusukebe!

[yusukebe]

Hi @hanspagel ! Sorry for confusing.

We moved the content to Snippets https://hono.dev/snippets/top .

So you can add a Scalar API Reference page to the "Integration".

cc: @sor4chi