Add wait time between contours for extruion and retraction
Before each contour starts, add some wait time (for pre-print extrusion).
After each contour finishes, add some wait time (for post-print retraction).
- Look at how time is calculated in Plan object when adding plans and doing collision checking
- Change jointsAt time function to use added vairable of time between trajectories
- add preprint time for real plan (Plan object)
- add post-print time for real plan
- add preprint time in Dec-MCTS CombinedScheduler
- add post print time in Dec-MCTS CombinedScheduler