openapi.schema Does Not Exist

Docs indicate that `openapi.schema` should exist https://github.com/cloudflare/chanfana/blob/270536a555c40572bf189cf74a0c7ceacb6a203e/docs/examples-and-recipes.md?plain=1#L730

For context I am trying to pass it to Scalar's `createMarkdownFromOpenApi` like so:
```
const openapi = fromHono(app, {...})

app.get("/llms.txt", async (c) => {
return c.text(await createMarkdownFromOpenApi(JSON.stringify(openapi.schema)))
})
```

Start with the referenced section of docs/examples-and-recipes.md and trace the object returned by fromHono(app, {...}) to verify whether its schema is exposed. Reproduce the Scalar createMarkdownFromOpenApi usage, then confirm the documented property exists and produces the expected OpenAPI output.

Written by the indexing model from the issue text.