move helpers to new workspace folder

packages/helpers/wait-for.ts

@@ -0,0 +1,21 @@
+import { setTimeout } from "node:timers/promises"
+
+const maxTime = 1000
+
+export async function waitFor<Result>(
+  predicate: () => Result,
+): Promise<Awaited<Result>> {
+  const startTime = Date.now()
+  let lastError: unknown
+
+  while (Date.now() - startTime < maxTime) {
+    try {
+      return await predicate()
+    } catch (error) {
+      lastError = error
+      await setTimeout(50)
+    }
+  }
+
+  throw lastError ?? new Error("Timeout")
+}