Modularize and update hpoa genes to phenotype ingest

[kevinschaper]

Primary goals:

• Capture disease as qualifier (mapped to MONDO? or original? or both? there's no original_subject_qualifier)
• Submit pr for "disease_context_qualifier" to be a slot for GeneToPhenotypicFeature
• Display disease in UI (maybe an argument for mapping to MONDO?)
• Capture frequency information that is passed on from the d2p association
• Update association UI to show the frequency column for human g2p (currently only being shown for d2p)
• Make it modular as a standalone repo/data product

I think there's an argument that all 3 hpo files that we produce could be part of the same ingest, but I don't know if it's worth it to do them all at once.

The big question is where to capture the disease as a qualifier and whether to use the original disease ID or map to mondo.