Fix mesh susceptibility

enabled an automatic merge when the pipeline for cbc03477 succeeds

aborted the automatic merge because source branch was updated

added 1 commit

• 08e7c61b - Explain changes

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added 4 commits

• 6f8175c9 - Add dipole approximation for anisotropic susceptibility
• 3edf68bf - Factor out index/shift from SusceptibilityGridElement
• a660414a - Add anisotropic susceptibility version of GridElement
• dd85ffa7 - Add anisotropic version of triangle susceptibility

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merged