docs: add ontology resources and guidance for subject matter annotation

[bendichter]

Add helpful links and usage guidance for the Subject Matter section:

• Reference EMBL-EBI Ontology Lookup Service for searching ontology terms
• Clarify when to use Anatomy type (brain areas, cell types)
• Clarify when to use Disorder type (diseases, disorders)
• Reference Cognitive Atlas for cognitive functions using Generic Type

[bendichter]

I'm going out on a limb a bit here. I don't know ontologies that well.

[yarikoptic]

all of those should IMHO be

• linked at the level of dandi-schema model as/where appropriate
• Web UI of meditor should get a facility to construct a list of preferred available values out of already present in metadata records in the archive while allowing for entering new ones which would potentially validate as belonging to ontology tc

FWIW, somewhat of a similar approach, although IMHO a bit more structured since it is an entire consistent collection of records of various types (Institution, Person, ...), not just collection of dandiset records, is taken by the https://github.com/psychoinformatics-de/shacl-vue by our colleagues which @candleindark . E.g. go to https://dfg-cp-survey.trr379.de/ui/?sh%3ANodeShape=trr379cps%3AContributor&edit=true and try to enter affiliation -- it will give you a list of entries prepopulated from RORs index IIRC, but you would have a way to add a new entry for an institution:

[bendichter]

@yarikoptic this seems like an issue for DANDI Archive, concerning UX of the meditor, right?

[kabilar]

I'll defer to Yarik on this one. I am not yet too familiar with ontologies.