WIP: Docs improvement

[caemor]

I was teaching a class with a few students this semester. A small part of that was solving some tasks for the Microbit in either Rust or C++. And the Microbit documentation was still confusing for students who haven't done a lot of embedded stuff.

I would like to add more examples to the board structure (similar to the radio example). Or is that too much future maintenance work?

[therealprof]

Adding more examples sounds great to me.