adds a dropdown menu to select an anchor footprint from the
reference rule area. The corresponding footprints in the
target areas determine displacement and rotation off all the
replicated items. If no anchor footprint has been selected
the previous behavior is unchanged, i.e. rule area position
determines placement.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/20603
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
