The doxygen-awesome-css project is just a nice, simple, customizable
CSS system for making doxygen look less like 1992 and more like
2022. I need to spend a bunch of time tweaking it to make it
look good, and perhaps match it to the style already used at
chess.frzn.dev.
Added more inline Doxycomments, and also generated an image that
represents the logical layout of the boardGrid member variable,
showing the mirrored layout. This works well for our project
because of the way the serial data comes in.
