one 2D line in {normal, distance} form
the point to bring to the first line
the point to bring to the second line
an array of solutions in {normal, distance} form
origami axiom 6: form up to three lines that are made by bringing a point to a line and a second point to a second line.
a refactoring from C++ of Robert Lang's cubic solver from Reference Finder: https://langorigami.com/article/referencefinder/
one 2D line in {normal, distance} form