chore(issue-58): adding a new example

src/routes/issue-58/+page.svelte

@@ -0,0 +1,14 @@
+<!-- +page.svelte -->
+<script>
+  import { source } from '$lib'
+  import { playwright } from '$lib/playwright/playwright'
+  const connection = source('/issue-58/events', {
+    options: {
+      method: 'GET',
+    },
+  })
+  const message = connection.select('message')
+  $: playwright.state.issue55.messages.push($message)
+</script>
+
+<h3>{$message}</h3>

src/routes/issue-58/events/+server.js

@@ -0,0 +1,22 @@
+import { produce } from '$lib'
+import { delay } from '$lib/delay.js'
+
+export async function GET() {
+  return produce(
+    async function start({ emit }) {
+      // eslint-disable-next-line no-constant-condition
+      while (true) {
+        const { error } = emit('message', `${Date.now()}`)
+        if (error) {
+          return
+        }
+        await delay(1000)
+      }
+    },
+    {
+      stop() {
+        console.log('Client disconnected!!')
+      },
+    },
+  )
+}