Option to visualize concept hierarchy of suggestions

[juhoinkinen]

Currently the Annif web UI is very plain, it shows just a list of suggestions and their scores.

I just noticed this HF Space by Javier de la Rosa which nicely displays the parents of subjects; we could add an option to show a similar view in Annif:

[juhoinkinen]

Note to self: This Javier de la Rosa is a different person than the Head of Language Models of the National Library Norway.