Add chapter WIP draft, code and example files

[hristog]

• Sharing a WIP version for visibility, so that the overall direction is more obvious, instead of just having an outline in a bullet-point form.
• Still working on the narrative of the chapter, and polishing some parts of the code.
• Comparing to other chapters from previous books, this one is becoming a bit too long, but I've opted to provide all the content in this early draft, for the purpose of visibility (from editing perspective). I confirm that my intention is for the chapter to ultimately fit within a similar word-count range as the other chapters.
• This PR isn't necessarily meant to be merged whilst it's in a draft state.

[hristog]

@gvwilson you're welcome to merge this one when you get a chance (and if you don't have any objections). It should already contain enough material, in order to be able to provide a relatively good picture regarding what the chapter and corresponding sections are going to be about.

I'll follow up with another PR, polishing the content further.

Upon finalising the chapter, the following files are going to be removed from the diff directory:

• Makefile
• outline.md
• possibly, the examples sub-directory.