We recently tried to roundtrip MicroPython to Pyodide (main to worker) and things didn't go nearly as smooth as expected, mostly because we don't provide a transform functionality in coincident, which is also not trivial as we bootstrap coincident earlier, even before we know which runtime it's going to interact with.

The goal of this issue is to find a way to use the transform ability of coincident from the main to the worker so that dictionaries, as well as any other Python type, can be passed along when PyWorker is used main to worker, something we haven't properly tested before.