feat(api): startVitest() to accept stdout and stdin

[AriPerkkio]

Description

Adds new options to startVitest() so that stdout and stdin can be handled without overriding globals.

import { ReadStream } from "node:tty";
import { Writable } from "node:stream";
import { Console } from "node:console";
import { startVitest } from "vitest/node";

const stdin = new ReadStream(0);
const stdout = new Writable({
  write(chunk, _encoding, callback) {
    console.log("Captured", chunk.toString())
    callback();
  },
});

await startVitest(
  "test",
  [],
  { watch: true },
  undefined,
  { stdin, stdout }
);


// Re-run all tests
stdin.emit("data", "a");

// ... wait for tests to finish etc.

// Quit watch mode
stdin.emit("data", "q");

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. If the feature is substantial or introduces breaking changes without a discussion, PR might be closed.
• Ideally, include a test that fails without this PR but passes with it.
• Please, don't make changes to pnpm-lock.yaml unless you introduce a new test example.

Tests

• Run the tests with pnpm test:ci.

Documentation

• If you introduce new functionality, document it. You can run documentation with pnpm run docs command.

Changesets

• Changes in changelog are generated from PR name. Please, make sure that it explains your changes in an understandable manner. Please, prefix changeset messages with feat:, fix:, perf:, docs:, or chore:.

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[AriPerkkio]

Not sure why this started to fail now. The only.test-d.ts is not defined in the custom TS config.

[sheremet-va]

I don't remember 🤔

[sheremet-va]

Let's merge this as a patch since it modifies the public API which is not affected by the semver.