Add perimeter reordering : InOutIn inspired from OrcaSlicer.

[n-dony]

This PR add an InOutIn reordering of perimeters. This is strongly inspired by the OrcaSlicer implementation.

Two options are added :

• inoutin_perimeters : activate the reordering
• invert_internals_order : reverse the order of the internals (idx >= 2) perimeters comparing to the usual mode (normal or external-perimeters-first).

Printing the internal perimeters (idx >= 2) from ouside to inside, then printing the external (idx 0) and finishing with the firsts internals (idx 1) seems to reduce the internal tensions and stop the front hull of the benchy from curling (Fig. 1).

Fig.1 : Benchy printed on a Mini with 0.4 nozzle, IS 0.20 speed profile. Left: no reordering, right: InOutIn reordering.

In some cases (e.g. 10.60 mm from the benchy Fig. 2), the Arachne produces two small loops (idx 2) and the final order is not optimal.

Fig. 2: Top: On the left, the first small loop and on the right, the following perimeters (idx 1 and 0),
Bottom: On the left, the second small loop and on the right, the following perimeters (idx 1 and 0).