Request: Interactive labels and / or slickgrid metadata table

[mortonjt]

It would be super useful to have some way to provide more context behind the labels.
For instance, in the below biplot, I can visually see what OTUs are explaining the separation, but it would be super helpful to have some taxonomic labels to provide some more context.

Right now in Empress, there is a slickgrid table that lists all of the metadata, along with the option to specify which column to display as labels (another PR is on the way, will link once that's available).

CC @kwcantrell