Voron 0.2 Nevermore fanduct for external part cooling

A Fanduct to use the Nevermore Micro V5 Duo as external part cooling on Voron 0/0.1/0.2.

https://github.com/nevermore3d/Nevermore_Micro

Print it standing without supports.

update (06.04.2023, V17): some little adjustments, height fits for mini-Stealthburner