Simlation for META-DIFF benchmark

Most of the files necessary to replicate our work: simulation of benchmark datasets, scripts to build tables, and scripts to produce figures using the tables. Simulated datasets for META-DIFF benchmark: Contains abundances profiles reference genomes unique k-mers of targeted species config files (which have a seed for reporoductibility) scripts to produce replicates of abundances profiles. results from the search of functions in unitigs for the functional recall Figures: contains scripts to produce tables scripts to apply univariate analysis methods (aldex2, ancombc, deseq2, limma, wilcoxon's test) tables script to generate figures from the tables The bash and R scripts all have CLI arguments and take --help to display option (no argument also prints help for the bash scripts). Script Diff_Bif_metrics.sh executes Kmidff, Bifrost and the metrics script to make it easier. The colored DBG is too heavy for github and was uploaded here, it can be produced from the files on github. NOTE: we chose to upload config files instead of the whole simulated dataset as it weights several hundred Gigabytes, and as CAMISIM is a published tool with replication in mind.