refactor(cli): introduce the migration-runner helper for less code duplication and fewer return paths

Thanks to the migration-runner the "up" and "list" commands are now very similar code wise

packages/cli/src/array-from-async.ts

@@ -0,0 +1,14 @@
+/**
+ * This is a simple polyfill for [Array.fromAsync()](https://github.com/tc39/proposal-array-from-async)
+ *
+ * It converts an async iterable to an array.
+ */
+export const arrayFromAsync = async <T>(iterable: AsyncIterable<T>): Promise<T[]> => {
+  const array: T[] = [];
+
+  for await (const item of iterable) {
+    array.push(item);
+  }
+
+  return array;
+};