Coincident rewrite - A single roundtrip version (unbuffered)

[WebReflection]

This is the tested/working version of Polyscript with latest coincident rewrite.

Main changes:

• a new minimalistic version of coincident is being used where a single roundtrip is enough to satisfy worker/main roundtrips
• a fresh-new encoder/decoder is being used, which:
  • it is slightly faster than buffered-clone, hence much faster than structured-clone
  • it produces an outcome that is smaller than structured-clone yet bigger than buffered-clone
  • it was essential to understand what was going on and it turned out to work really well ... so I am sold for the time being, changes are required anyway in buffered-clone to be aligned with performance and accuracy (i.e. I've spent days after a null VS undefined absurd behavior embedded in some WASM interpreter and in our logic, breaking things in a very peculiar way)
• the coincident rewrite is not completed, reason it's name is under my personal handler, but its core part is ... I will try to improve also the whole window proxy story but I wanted something out as incremental update and also work on other things (so I am making myself not stuck with this topic)

I think I'll publish this to npm to hear from possible users if something is not right.