Places where Prefix.cc gets used

[cthoyt]

This is an epic issue on identifying where Prefix.cc is used, since that typically leads to places where prefix maps are consumed.

Here we can keep track of different ways of finding resources that use Prefix.cc:

1. Because the metadata4ing prefix was submitted to prefix.cc but not many other places, we can search for it to see where that data is consumed: https://github.com/search?q=http%3A%2F%2Fw3id.org%2Fnfdi4ing%2Fmetadata4ing&type=code

[cmungall]

curious how this shows where prefix.cc is used?