Increase detailed instructions for Library Carpentry Workshops

[emcaulay]

It is my understanding that most Library Carpentry workshops are customized. Drawing from more than just the Core lessons, and not always including all the Core lessons.

See, for example, this workshop that I was an instructor for recently: https://github.com/emcaulay/2023-10-31-orbiscascade-online.

It was a bit challenging to figure out the customization and I didn't love the display of the schedule (it's not aligned), but I couldn't figure out how to improve it.