Open code in Microbit Classroom

[Jaqster]

New Feature Request: objective is to bring curriculum (i.e. https://makecode.microbit.org/courses/csintro) closer together with classroom tools (https://classroom.microbit.org), making teachers' lives easier.

The idea would be to have a "Open in Classroom" button that could be enabled in docs (through some sort of markdown tag - don't want this to appear on all code snippets). This way, a teacher could easily take some starter code in a lesson from the curriculum and open it up in a Classroom session.

Another idea would be to have a way to share any project from the editor to Classroom - like some sort of button in the Share dialog.