fix: missing the polymorphism parameter in some config files and adding a description of this parameter in all config files

fix: missing the polymorphism parameter in some config files and adding a description of this parameter in all config files

main: using the slop parameter to insert the polymorphism inside the fasta sequence instead of using the header generated by getFasta with -name. Still the header must be formatted with CHR_POS_REF_ALT which can be obtained with bcftools annotate. Fixing #11

main: ensuring to remove quotes from the csv if present, and changing output from utf-8-sig to utf-8

main: adding the polymorphism parameter to simplify the management of PA of polymorphism in sequences