New micro:bit Python editor focused on supported text-based coding

This is a new version of the micro:bit Python Editor designed to engage students learning text-based coding.

The goal is not to hide all the complexities of syntax and structure, but to support students in learning about these things.

There's a simulator so you can try your code without the micro:bit.

Source code here: https://github.com/microbit-foundation/python-editor-v3