Create a nonblocking version of finalizeRust #593
Description
Current Status
finalizeRust Dart function blocks the main thread. This can be problematic if the blocking duration is longer than a few milliseconds.
Describe the Task
The job is to create an async settleRust function, deprecating finalizeRust. This will involve implenting a mechanism where Rust sends a singal to Dart via Isolate after the async runtime is dropped.