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

node_modules/import-in-the-middle/test/hook/v14-react-email-components.mjs

@@ -0,0 +1,16 @@
+import * as lib from '@react-email/components'
+import { Heading } from '@react-email/components'
+import Hook from '../../index.js'
+import { strictEqual } from 'assert'
+
+Hook((exports, name) => {
+  if (name.match(/@react-email\/components/)) {
+    exports.Heading = function wrappedHeading () {
+      return 'heading-wrapped'
+    }
+  }
+})
+
+strictEqual(typeof lib.Button, 'function')
+strictEqual(lib.Heading(), 'heading-wrapped')
+strictEqual(Heading(), 'heading-wrapped')