CiTO for blog citations

This is mostly a test, but if it turns out the way I hope it will, likely after a few iterations, it adds support in my blog for CiTO intent annotations to the DOIs I cite. I pondered about the earlier. In the JSON Feed it should, at least for now, show up like this:

"_references": [
  {
    "url": "https://doi.org/10.59350/er1mn-m5q69",
    "doi": "10.59350/er1mn-m5q69",
    "cito": [ "extends" ]
  }
]