Add search button

[lbourdois]

Hi!

I wanted to start by thanking you for this wonderful implementation that is so useful for sharing courses with students 🙏🙏🙏.

A student asked me if it was possible to have a search bar to be able to find content in the book more easily.
I see that it is possible on mdBook (see image below) and Jekyllbook is based on it, so I tried to add this feature myself but without much success... I've never done javascript before 😥

So I don't know if it's something that could be added easily or not.

In a similar vein, I saw that mdBook offers the possibility to print the book. Would it be something that could be added at the same time (if it's too complicated it's not a big deal, it's just a whim of mine to be able to touch with my hands a content I would have written rather than reading it on a computer)

Thank you in advance,

Have a nice day.

Loïck