Tracking issue for book updates

[adamgreig]

It's time to update the book! We'll use this issue to coordinate.

cc @rust-embedded/resources for help!

1. Introduction
2. Getting Started
3. Peripherals
4. Static Guarantees
5. Portability
6. Concurrency
7. Collections
8. Design Patterns
9. Tips for C programmers
10. Interoperability
11. Unsorted Topics

[wt]

The Portability chapter needs to be updated for the current structure of the trait crates like embedded-hal, embedded-io, etc.

E.g. The list here includes "Serial communication" when those traits were moved to the embedded-io crate.