add OpenAlex as source (formerly MS Academic Graph)

[mbjones]

The OpenAlex project provides a dump of the previous Microsoft Academic Graph system, and has opened it up and provided useful structured search capabilities. In addition to searching text, OpenAlex finds and indexes the canonical identifiers for Works, and cross-references those for citations.

The Arctic Data Center has an entry in OpenAlex: https://explore.openalex.org/institutions/I4210149162

But the don't seem to know about the works we publish. Might be worth a chat with Heather and Jason from OurResearch.

[mbjones]

@jeanetteclark In OpenAlex some ADC works are now listed with citations, but nowhere near out complete list. But it still might make a nice source for scythe. https://openalex.org/works?page=1&filter=doi_starts_with:10.18739