add ncbi gene information ingest files

[kevinschaper]

This looks great! The one last thing is a download.yaml entry to fetch the file

[kevinschaper]

We need to add species filtering to this still - in the source config yaml, it should look something like

filters: 
  - inclusion: 'include'
    column: 'taxon_id_column'
    filter_code: 'in' 
    value: 
      - '1234'
      - '5678'

(hopefully we put the actual taxon list in the issue)