Break up monolithic function into responsibilities. Adjust cleanup to
correctly modify each graphical pairing. Fix drc test to properly
report gap distances that are relevant to outlines
Fixes https://gitlab.com/kicad/code/kicad/-/issues/13090
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
(This prevents rectangle from not getting combined into pad if
proxy flag is turned off as Clipper collapses the polygon union
because it's too small.)
