concordance() - nice to have : exclude_markers filter by list of core genes

[silargi]

A nice-to-have, perhaps for the future.

Adding an option to filter the markers by the list of core genes, as specified in the organism-specific AMRrules https://github.com/AMRverse/AMRrules/tree/main/rules
For example:
result <- concordance(binary_matrix, exclude_markers = "core", organism = "Acinetobacter baumannii")