Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/cliui/index.mjs

@@ -0,0 +1,13 @@
+// Bootstrap cliui with CommonJS dependencies:
+import { cliui } from './build/lib/index.js'
+import { wrap, stripAnsi } from './build/lib/string-utils.js'
+
+export default function ui (opts) {
+  return cliui(opts, {
+    stringWidth: (str) => {
+      return [...str].length
+    },
+    stripAnsi,
+    wrap
+  })
+}