fpeaudecerf/pelagic_lipid_export: First release of pelagic lipid export code

This is the first release of the code associated with the model of bacterial degradation of lipids in marine snow particles sinking through the water column, and the associated computations of transfer efficiencies, as presented in the manuscript:

"Microbial metabolic specificity controls pelagic lipid export efficiency" Lars Behrendt, Uria Alcolombri, Jonathan E. Hunter, Steven Smriga, Tracy Mincer, Daniel P. Lowenstein, Yutaka Yawata, François J. Peaudecerf, Vicente I. Fernandez, Helen F. Fredricks, Henrik Almblad, Joe J. Harrison, Roman Stocker, Benjamin A. S. Van Mooy, BioRxiv (2024) DOI of manuscript: 10.1101/2023.12.08.570822