Reefscape mirror paths

[lidor51]

Besides red to blue flipping, due to reefscape symmetry, a util (either in gui/lib) to mirror an auto from the upper side to the lower side would be very beneficial.

[mjansen4857]

I think doing this in PPLib is better than the GUI, so both paths can be defined by the same file.

[lidor51]

In your implementation, what's the most user friendly way to configure that. Using custom in AutoBuilder? Or through modification to the auto chooser?

You can consider adding a booleanSupplier (mirror?) same as you do with flipping boolean supplier (with default to false).