feat!: introduce lazy compilation middleware

[JSerFeng]

Summary

Introduce LazyCompilationMiddleware, which is used to support handle requests sent by lazy-compilation.

Breaking change

There is no extra server for LazyCompilation, extra server has following issues:

1. Extra server cannot share the same proxy config with devServer
2. Hard to make CORS right, which has potential secure issue

In order to solve above issues, we move the logic inside previous lazy compilation server backend to a standalong middleware which can be used by any custom server.

eg.

import { experiments, rspack } from '@rspack/core'
import config from './rspack.config'
import { app } from './server'

const compiler = rspack(config)
if (config.experiments.lazyCompilation) {
  const middleware = experiments.lazyCompilation(compiler)
  app.use(middleware)
}

Even if your server does not support express style middleware, you can create a simple wrapper yourself, just to make sure you satisfy its interface

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

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[codspeed-hq]

CodSpeed Performance Report

Merging #9515 will not alter performance

_{Comparing refactor/lazy-compilation (6ad32ee) with main (9659d18)}

Summary

✅ 8 untouched benchmarks