Not sure what it is that caused it to break (reported by
Seth on Linux, but works for me and on the CI).
Rather than trying to be clever at this point, just do the dumb
thing (and remove the boost_test_print_type for wxSize to prevent
someone using it for the time being).
The m_imageData buffer in the BITMAP_BASE is an
internal implementation - the public API to persist the
data to a stream appears to be SaveImageData - so use that,
which hides the implementation (and generates the image data
"live" when needed).
Remove the public access to the m_imageData buffer as it isn't
needed for public use, and also is misleading.
Also break out the formatting of the data into KICAD_FORMAT,
as it's currently replicated in eeschema/pcb/pagelayout
formatting code.
Fixes: https://gitlab.com/kicad/code/kicad/-/issues/19772
Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
Since Boost 1.64, you can use the boost_test_print_type
customisation point to provide test printing for types.
Move all test printing functions to this, and scrap the
fiddly Boost version handling to deal with older Boosts
(KiCad is now at minver 1.71).
