doc: add esm examples to node:timers · nodejs/node@20be5e2

For `setImmediate()`:

```js

```mjs

import { setImmediate as setImmediatePromise } from 'node:timers/promises';

const ac = new AbortController();

const signal = ac.signal;

// We do not `await` the promise so `ac.abort()` is called concurrently.

setImmediatePromise('foobar', { signal })

.then(console.log)

.catch((err) => {

if (err.name === 'AbortError')

console.error('The immediate was aborted');

});

ac.abort();

```

```cjs

const { setImmediate: setImmediatePromise } = require('node:timers/promises');

const ac = new AbortController();

For `setTimeout()`:

```js

```mjs

import { setTimeout as setTimeoutPromise } from 'node:timers/promises';

const ac = new AbortController();

const signal = ac.signal;

// We do not `await` the promise so `ac.abort()` is called concurrently.

setTimeoutPromise(1000, 'foobar', { signal })

.then(console.log)

.catch((err) => {

if (err.name === 'AbortError')

console.error('The timeout was aborted');

});

ac.abort();

```

```cjs

const { setTimeout: setTimeoutPromise } = require('node:timers/promises');

const ac = new AbortController();