New draft for the flow-shop chapter.

Latest changes according to feedback from @mdibernardo and a completed chapter draft.
This section feels a little superfluous to me. I think the most interesting point here is the reminder that strategies could shift, and that feeds into the overall thrust that LNS is a "best effort" approach. This conclusion feels like it would be more at home in an academic paper (maybe that's where a lot of your formal writing experience is?), and I feel like you could make this section, though small, more impactful somehow, to leave a stronger impression or takeaway in the reader's mind. It might be helpful to think about how you want your audience to feel after having read this; rather than focusing on the minutiae of which Python packages you used, perhaps talk about how LNS lets you create practical solutions to otherwise imposing problems?