Geometry_Engine: IsRigidTransformation query returns false for reflection

#### Description:
As in the title, reflection is considered a non-rigid transformation in BHoM - looking at the code, it seems to be a typo in line below, `Math.Abs` should be targeted at determinant, not 1-determinant.
https://github.com/BHoM/BHoM_Engine/blob/fa7184b8e3a2668cd59a7440c35503aa4de2168a/Geometry_Engine/Query/IsRigidTransformation.cs#L72