Support for Pyodyde

[mmatera]

Hi,

I was wondering if you have considered implementing the support for Pyodide, which is an emscripten-based implementation of Python.
I am a part of the developer team of Mathics-core (https://github.com/Mathics3/mathics-core/) and we use stopit to implement time-constrained evaluations of WL expressions. Recently, we started supporting Pyodide in the project, but we still cannot implement time-constrained evaluations on that platform.

In Mathics3/mathics-core#1160 (comment), it was suggested that something like that could be implemented through the cooperation from the javascript environment hosting the pyodide interpreter https://pyodide.org/en/stable/usage/keyboard-interrupts.html