How to pass boxed values

I am trying to return sth like `Arc` from a function, but this fails as `TryIntoJs` is not implemented for `Arc`. Is there a workaround for this, or could this be added easily?

Start by locating the TryIntoJs trait and existing implementations for boxed or shared values, then inspect how Arc is handled in the Rust-to-Node.js conversion path. Confirm whether a workaround already exists and define done as supporting Arc without breaking current conversions, with a focused test for the returned value.

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