Nicolas Tancogne-Dejean requested to merge manual_phonon_finite_differences into main Apr 18, 2024

Description

Introducing a manual page for the finite difference phonon calculations. Also adds some in-code documentation and minor code cleaning.

News snippet

Introducing a manual page for the finite difference phonon calculations.

Checklist

I have checked that my code follows the Octopus coding standards
I have added tests for all the new features added in this request.