0d964f91a2
Adds extrude operator to new curves. Press key E in edit mode to invoke. It works correctly on Bezier curves also, but result is weird as there is no way to control Bezier handles interactively. Currently operator works the same way as in old curves. Algorithm idea is same as in https://archive.blender.org/developer/D15524 Pull Request: https://projects.blender.org/blender/blender/pulls/116354