RFC: Meta: Add a "How do we teach this?" section to the proposal template

[krilnon (Kyle Murray)]

@beccadax

I feel like this is appropriate mainly for proposals which introduce new syntax (e.g. some of the string literal stuff I've had a hand in recently) or new subsytems with complicated semantics (e.g. UnsafeRawPointer and the concept of "binding" memory to a type). But I think there are a lot of proposals where the content would be very trivial.

(Then again, some of our existing sections often have one-sentence or even one-word answers, so maybe I'm overthinking this.)

Building on your ideas here, perhaps the carrot-based approach to prototyping this would be to take a look at some upcoming proposals, find a few that look trickier to teach, then contact the author and suggest adding a section about how the proposal is amenable to being taught. If they aren't comfortable doing it themselves, someone could volunteer to help write that part.