Use more descriptive reference style

[hirotnk]

Reference:
https://github.com/asciidoctor/asciidoctor.org/blob/master/docs/_includes/xrefstyle.adoc

To me, it looks better to be able to see chapter/appendices, etc. @happi if you prefer other style I can make a change accordingly.

Before:

After:

[happi]

OK, lets try it.
At some places I feel the reading flows easier with just the name of the chapter instead off the full reference. Best thing would probably be to have explicit short and long references in the text.

[hirotnk]

Thank you for the feedback, then I will look into this a bit more to see if there is a better option.

[hirotnk]

@happi I checked several technical books and noticed the style like Chapter 8 or Section 3.4 are popular. So I'd like to change to that style. I think this is more like a matter of taste, but for now, I propose to pick that style.

[happi]

Fine.

[hirotnk]

Thank you, updated.