How do you properly call an async function under tokio?

[leobelen]

Describe the bug
There is no clear way to use async native functions. The only thing that happens right now it that it hangs. If you run https://github.com/SurferTank/boats_async_fn you will see an example.

I see we need to provide a job queue executor, but no examples are available except for https://github.com/boa-dev/boa/blob/90048f2eff99c5699a9ba3d6e4ecb10f05e79105/boa_examples/src/bin/futures.rs but it describes how to use smog. Could we have a similar example using tokio too?

To Reproduce
Steps to reproduce the issue, or JavaScript code that causes this failure.
git clone https://github.com/SurferTank/boats_async_fn;
cd boats_async_fn
cargo r

Expected behavior
the code should run without a hang.

Build environment (please complete the following information):

• OS: MacOS
• Version: Sonoma
• Target triple: aarch64-apple-darwin
• Rustc version: 1.76.0-nightly (5ac4c8a63 2023-12-20)