fastify-autoload Not able to have top-level await in a ts ESM file?

Prerequisites

[X] I have written a descriptive issue title
[X] I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.18.0

Plugin version

5.7.1

Node.js version

18.16.0

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

Arch Linux x86_64 (kernel: 6.3.9-arch1-1)

Description

The "bug" is that, when I'm trying to auto load my routes from my routes folder, it appears that the plugin is not happy with me using top level await in my file.

But I don't get how that is something that the plugin should care much about?

As stated above, I'm trying to load routes from a 'routes' folder. This is because I didn't find much documentation on doing the registering of the routes via something like how Express does it with app.use('/login', loginRoutes).

I'm using tsx to run the app/server. Since I'm using TypeScript for it.

Steps to Reproduce

This will be pseudo code just to show the example:

import { TwitterAPI } from 'twitter-api-v2'

/// Create a Twitter client...

const user = await twitterClient.v2.me();

This is a simple way to mimic it, maybe there is a better way to reproduce it with just importing a simple function that returns a Promise with a type.

It should then give something like this(maybe only with one error in the error array, this is just using what I got):

  errors: [
    {
      detail: undefined,
      id: '',
      location: [Object],
      notes: [],
      pluginName: '',
      text: 'Top-level await is currently not supported with the "cjs" output format'
    },
    {
      detail: undefined,
      id: '',
      location: [Object],
      notes: [],
      pluginName: '',
      text: 'Top-level await is currently not supported with the "cjs" output format'
    }
  ],