Add http.serve() API based on Fetch (Request -> Response)

What is the problem this feature will solve?

Node provides fetch, Request/Response, and Web Streams, but no high level server API using this model.

Other runtimes such as Deno and Bun expose a serve API based on the Fetch contract. In Node, similar patterns are commonly implemented in userland (e.g., frameworks like Hono), which indicates demand for this abstraction.

This was discussed in #42529 and received support, however that issue is focused on request.toWeb(), so opening a separate issue focused on this API.

What is the feature you are proposing to solve the problem?

Add a high-level http.serve(handler) API.

An example shape could be:

http.serve((req) => new Response("ok"))

handler: (Request) => Response | Promise<Response>

This would coexist with the existing http.createServer, and be a high level alternative using WHATWG APIs instead.

What alternatives have you considered?

• Continue using http.createServer directly.
• Implement this in userland, or use existing 3rd party solutions.

まず、Node の既存の http.createServer API と issue #42529 の議論を確認します。提案されている作業は、Request と Response を使用して http.serve(handler) を定義・追加し、createServer を引き続き利用可能にすることです。完了条件は、API の形状と動作について合意され、実装され、同期および非同期のハンドラーについてカバーされていることです。