Fix #1997 - Bring pyscript stdlib to the PyEditor

[WebReflection]

Description

Fixes #1997

---

This MR should fully solve this discussion #1997 by providing, from core itself, our stdlib within the PyEditor custom type (both py-editor and mpy-editor).

All concerns are likely premature as users never had a chance to use our module in there, so this is a starting point that still will require some documentation update.

Changes

• use a codeBeforeRun hook that executes on XWorker bootstrap once and includes our stdlib artifact, as that's exactly what any other PyScript tags uses anyway
• add a check for config attribute, and, if there:
  • if no env was specified, use that config
  • if an env was specified and known:
    • if the env had a config, throw an duplicated config for env: ...
    • if the env had no config, throw an unable to add a config to the env: ...
  • bootstrap the worker for that env with that config otherwise
• flag the env as known regardless
• remove the async nature of the MO callback as that backfires with tons of errors otherwise and it wasn't needed anyway
• test everything works as expected

Checklist

• All tests pass locally
• I have updated CHANGELOG.md
• I have created documentation for this(if applicable)

[ntoll]

Bravo!

[WebReflection]

Published as npm:

• JS https://cdn.jsdelivr.net/npm/@pyscript/core@0.4.11/dist/core.js
• CSS https://cdn.jsdelivr.net/npm/@pyscript/core@0.4.11/dist/core.css

Once green again, I'll merge into main, thank you.