Module:Taxonomic rank metadata/doc

This Lua table stores additional metadata of any type needed for the focal Linnaean ranks for a wiki. One use case are grammatical variations of taxon names. Note that the Linnaean rank "Order" is represented as "Order_taxon" by convention here because "Order" creates conflicts with SQL keywords. This is a convention for the back-end only, whereas on front-end pages the text is swapped out so "Order" is displayed correctly.