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.
Still struggling to understand all these concepts, and I will admit
to using ChatGPT to try and explain where I was going wrong which
did help quite a bit. But if I get this right it will be much
more robust and less "fragile" as they say.
This commit adds a bunch of getters/setters for accessing the
boardGrid. This is a simpler way to allow both Piece and all
the inherited classes to access the Board without having to
declare every single class a friend. So now when we want to
access boardGrid, we use getPieceAt() or setPieceAt(). They
are overloaded to accept rank/file, Square, or int/int.
There's also a convenience function to check if the square
is empty, though that may get re-written to use the existing
Square.isValid().
