Feature: PDF book

[SallyMcGrath]

Which module(s) and week(s) does this change affect?
Module(s): all
Week(s): all

What is the work that needs to be done?

1. create a layouts/_default/book.html
2. compose all the preps, day plans , guides, etc that we want on to this page
3. write a proper print stylesheet (do this even if not the pdf part)
4. consider: generating a pandoc pdf after build or throw in a jsPDF and put the book in the Guides menu

Why is this work important to do?

We want to make this site as usable as possible and properly thought out printable pdfs is part of that

Additional context

I'll probably do this, just writing it down so I don't forget, but feel free to scalp me 😉 just make sure you update the ticket

Who might need to know about this change?