Merge the two GPIO sections?

[kiffie]

We could combine the two GPIO sections into a single section and describe

• typical features of a GPIO pin (input, output, open drain, pull-up, pull-down, etc.)
• how these features are handled with the embedded HAL trait(s)
  and, of course, try to keep it short.

Let's discuss in the next meeting or so.

[david-sawatzke]

My thought was that getting to blinky should be very handhold-y, and thus relatively verbose.

We should coordinate on what we want to just consist of pointers to resources vs. telling people how to do something (and everything in between) in the next meeting as well.