Add k6/experimental/streams example

Co-authored-by: oleiade <[email protected]>

examples/experimental/streams.js

@@ -0,0 +1,34 @@
+import { ReadableStream } from 'k6/experimental/streams'
+import { setTimeout } from 'k6/timers'
+
+function numbersStream() {
+	let currentNumber = 0
+
+	return new ReadableStream({
+		start(controller) {
+			const fn = () => {
+				if (currentNumber < 5) {
+					controller.enqueue(++currentNumber)
+					setTimeout(fn, 1000)
+					return;
+				}
+
+				controller.close()
+			}
+			setTimeout(fn, 1000)
+		},
+	})
+}
+
+export default async function () {
+	const stream = numbersStream()
+	const reader = stream.getReader()
+
+	while (true) {
+		const { done, value } = await reader.read()
+		if (done) break
+		console.log(`received number ${value} from stream`)
+	}
+
+	console.log('we are done')
+}