Refactor: use native async fn in trait syntax

[andylokandy]

Summary

The native async-fn-in-trait has been available in the nightly version for some time now. Perhaps it's time to start replacing async_trait with this native feature.

[ct20000901]

I'm genuinely interested in this task, and if it's possible, I would be honored to take on the responsibility of completing it.

[andylokandy]

@ct20000901 Just a reminder, the native async in trait doesn't support dyn object yet.

[ct20000901]

@ct20000901 Just a reminder, the native async in trait doesn't support dyn object yet.

Thank you for the reminder, and I have already discussed this with PsiACE. Currently, the plan is to refactor the parts that only involve static calls to traits.