Features Suggestion

Feature description:
Give the option to specify a value for the thickness of the RadarChart border to allow for improved visibility when an arm has values while the neighbouring arms do not, which produces a polygon of the same width as the radarchart arm and difficults visibility on it.

Code example:

WpfPlot wpfPlot = new();
int borderThickness = 2;
RadarPlot radarPlot = wpfPlot.Plot.AddRadar(values);
radarPlot.BorderThickness = borderThickness;

wpfPlot.Render();

If it makes no sense, I believe it would to make the Thickness of the border at least 2 instead of the current default value, which is 1.