fix(modeling): geom2 mirroring transform

[platypii]

Fixes #1301 (thanks @gilboonet)

When a mirroring transform is applied to a geometry, we should reverse the point order so that orientation is preserved.

This was already done for geom3/poly3 geometries here, but was not applied to geom2.

This PR uses the 2D determinant in geom2.transform to check if a transform is a mirroring transform in 2D.

Added to V3 branch since this is technically a breaking change. Although I would argue this is a fix of bad behavior.

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