Rewrite "What we teach and why"

[illicitonion]

https://programming.codeyourfuture.io/guides/reviewing/paradigm/ is no longer accurate in a bunch of ways. We should rewrite it.

[Dedekind561]

Hello there everyone,
I'm taking a high-level, motivating approach to this re-write so far. I'm currently talking about problem solving, threads, independent learning and mental models etc. I'll also point people back to the course overview too.