[feat] async_runtime for better async-task tracing

[Tunglies]

Describe the problem

In tokio-console, tracing warnings tasks becomes hard when they warp as location tauri::async_runtime::spawn. Have no clue which exactly task lead to.

Describe the solution you'd like

Some additional track_caller attribute will handle property

+ #[track_caller]
pub fn block_on<F: Future>(task: F) -> F::Output {
  let runtime = RUNTIME.get_or_init(default_runtime);
  runtime.block_on(task)
}

Add on

No add

Alternatives considered

It could be add on when enable the tracing feature.

Additional context

No response