Add fiber generation Python-svMultiphysics codes to utilities

[javijv4]

Problem

Current fiber generation codes are not in a general repo.

Solution

Add the fiber generation codes to svMultiphysics/utilities.

Additional context

These codes use a combination of Python and svMultiphysics scripts to calculate the fiber orientations in biventricular geometries.

The implementation includes the method from Bayer et al. 2012, and Doste et al. 2018.

Code of Conduct

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