Scatter and Signal plots have a step mode which connects points with a corner rather than diagonal line.

Example:

• https://scottplot.net/cookbook/4.1/category/plottable-signal-plot/#step-display

An option should be added so the step is top-left instead of bottom-right

This feature was suggested by @dhgigisoave in #1811