Consider separate Joda extension

The joda bits are currently stored in the oaipmh extension as this is the only extensions using it. Let's keep in mind that we could create a support extension or a quarkiverse one when a second project use it.

Start by inspecting the oaipmh extension to locate the Joda-related code and determine whether another project uses it. Done means reaching a decision on whether to create a separate support or Quarkiverse extension; the issue provides no file or test names.

Written by the indexing model from the issue text.