Ability to move backward

[Leo428]

In vannaka/Motion_Profile_Generator, I tried to generate a motion profile that moves the robot backward. However, the velocity points it generated are all positive and moving the robot forward. In vannaka/Motion_Profile_Generator issue section, the author explains this is a feature that is not in the Pathfinder library. I understand that I can invert the points manually, but I just want to ask if it is possible to add this feature. Thank you!

[dkt01]

This should likely be linked with #36 since that issue also involves generating negative velocities