This is a zero-dimensional object that can be used for snapping
and documentation of useful, but non-physical features on a
board or footprint. They do not correspond to any physical
output in exports or plots.
Points do have a "size", but this is a graphical property only
and determines how large they are drawn on the board.
They also have a layer, which allows them to be selected and
made visible according to layer filters.
Fixes: https://gitlab.com/kicad/code/kicad/-/issues/4691
