Investigate loading NCIt terms as needed using API

[creisle]

When loading CIViC and other resources which refer to NCIt terms we sometimes run across a term that was not loaded already by the NCIt loader. It would be convenient to be able to fetch these on a one-off basis from an API. We would need to load the term itself as we ll as its parent relationships and parents if they did not already exist

There doesn't appear to be an API available directly from NCIt but they may be included in the more general ontologies API here

https://data.bioontology.org/documentation#nav_home

If so, make a new loader file to load from this API src/bioontology/index.js with functions to load given a specific ontology term and the source ontology name, something like uploadAndConnectTerm(<SOURCE ONTOLOGY>, <TERM ID>)