ENH: output GFF files from the eggnog-diamond-search action

[misialq]

Is your feature request related to a problem? Please describe.
No.

Describe the solution you'd like
When performing ortholog search with the eggnog-mapper, it is possible to output a bunch of GFF files with information on the actual gene predictions for each fasta file. We should expose this as an additional result artifact, if possible - the GenomeData[Loci] type seems like a suitable choice. Also, when prodigal is used for gene prediction, outputting the actual gene sequences is possible and could also be exposed using GenomeData[Gene].

Additional context
There is a mention of this functionality here.