Update ontology.iedb.org

[jamesaoverton]

The ONTIE/SoT website is at https://ontology.iedb.org/. It's currently implemented using https://github.com/knocean/knode, and it doesn't work very well. I'd like to replace it using https://github.com/ontodev/gizmos.

There are two main components:

1. ONTIE term list: this can be improved to a Gizmos tree with search
2. SoT resources: this should use Gizmos export

If possible, I'd like the REST API to continue to work, which means that the tests here should continue to pass: https://github.com/IEDB/ONTIE/tree/master/test. I don't care about the Term Submission section at the end of the API doc.