* Change direction for perimeter extrusion at odd layers.
Initial test code based on supermerill/SuperSlicer@87245ae3c1
* Perimeters for both contours and holes can have alternating direction, to support overhangs on both side.
Also fixes wipe on loop.
* Only reverse order if the loops have steep overhang
* Support a special case that treat every layer as steep overhang
* Add options
* Disable overhang reverse if vase mode is enabled
* Allow extrusion reversal and skip overhang detection if fuzzy skin
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Co-authored-by: supermerill <merill@free.fr>
Co-authored-by: SoftFever <softfeverever@gmail.com>
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