feature: source references

[gordonkoehn]

sr2silo needs aminod acid references for SILO and for diamondX.

These have to be of the very same at V-Pipe and SILO.

It is probably best to get them from SILO / Pathoplexus as they also have amino acids.

And compare the nucliotide reference against V-Pipe, in unittests.

---

The current reference is from NIH, and manually reformated for use in Blast/Diamond.
The resoeuces in references should be filled from nextclade or genspectrum.

[gordonkoehn]

This PR should fetch references from:

curl -X 'GET' \
  'https://lapis.pathoplexus.org/cchf/sample/referenceGenome?downloadAsFile=false' \
  -H 'accept: application/json'

Or from Covspectrum for now:

curl -X 'GET' \
  'https://lapis.cov-spectrum.org/gisaid/v2/sample/referenceGenome?downloadAsFile=false' \
  -H 'accept: application/json'

remove the current, https://github.com/cbg-ethz/sr2silo/blob/main/resources/sars-cov-2/reference_genomes.json

Remove this outdated one.
https://github.com/cbg-ethz/sr2silo/blob/main/resources/sars-cov-2/NC_045512.2.fasta

And decide whether to keep or not the resource folder. Probably remove / and add an argument to the CLI to show the reference used. Download it to run offline.