I could not find any official zathurarc, so I followed along with the config.c recording as much as I thought relevant for most people.
I write with a very particular style so that may not be liked.
It is a bit disorganized;
as such, I may rewrite it and split it up into about four files:
zathurarc, normalrc, indexrc, and presentationrc
Three of these would be called into zathurarc via the include <...> line—this
would also then offer an example of how to do this.
My intent was to modify the meson file to tell it to copy doc/sample_zathurarc to /usr/share/doc/zathura/sample_zathurarc or /usr/local/share/doc/zathura/sample_zathurarc, but I did not know how to do that.
I believe I have submitted this request to the development branch properly.