Generate BASE Compliant OAI-PMH XML files from Wikidata entries

[bootsa]

With the simple OAI-PMH server (#52) working on toolforge (#53), generating compliant XML files from Wikidata entries is next.

Two possible path's seem worthy of initial exploration:

1. using CitationJS to generate a JSON object from Wikidata and then producing XML output using either:
   1. creating a custom CitationJS output plugin
   2. XMLBuilder2
   3. xml-js
2. using XSLT to transform the RDF record of a Wikidata entity (encoded as XML) into a BASE compliant XML file

Creating an XSLT transform (2) would probably be more useful in creating a generalised solution for Wikibase (#14) though involves traversing multiple interlinked nodes which could be tricky and might be more brittle than (1).

As we have established that CitationJS generates a well formed JSON object from Wikidata (including some clean up of Author names, etc) (1) might be a quicker, though more specific to solely our project, approach.

Thus I shall prioritise investigating (1) first.

[bootsa]

Created a processing pipeline to automate the process using Github Actions.

Works well when running locally and reducing the number of entities pulled from the wikidata api to around 75.

Need to implement some kind of rate limiting.

[bootsa]

Rudimentary rate limiting implemented - InvasionBiologyHypotheses/enKORE-corpus-processor#1

Technical issues will be documented in the repo's issue tracker.

Leaving this open for discussion about the structure of the XML output.