Stream support in res.send()

[bjohansebas]

I think we should support sending streams as part of the res.send() API, allowing us to do the following:

const fs = require('node:fs')

express.get('/streams', function (req, res) {
  const stream = fs.createReadStream('some-file', 'utf8')
  
  res.send(stream)
})

And along with that, support web streams so that it’s quite easy to use Blob, Response, and ReadableStream

Could this be a breaking change? How much would it affect the middleware we maintain, for example, compression, which transforms the response? These are things that would need to be investigated, but I fully support this integration. Fastify has it, and so does Koa.