a FOLD representation of the SVG image, not yet a planar graph, no faces, and possible edge overlaps.
This method will handle all of the SVG parsing and result in a very simple graph representation basically only containing line segments and their assignment/foldAngle. The graph will not be planar (edges will overlap), no faces will exist, and duplicate vertices will exist and need to be merged
an SVG image as a DOM element or a string.