Filter diseases by species in results page

[monicacecilia]

Low-hanging fruit and low priority.

It would be useful to show the diseases according to species on the landing page following a search
Information is in Mondo, but we don't have the Taxon as a 'node.'
Ideally, for the Monarch app, we want this to be converted into a property; we don't want it to be an edge.
Once updated, we can leverage the current table to filter per species.

(archive at #789)