secret coordinate helpers

[jrhizor]

resolves #6099

[jrhizor]

todo:

• add airbyte prefix to secrets
• clean up
• add followup tickets
• add docs
• decide if we want true versions or to always bump (and implement if needed)

[sherifnada]

Was mainly looking at test cases, the main one I would suggest adding is a nested oneof (inside an object)

another thing is that it would have been super helpful to have javadocs on the classes and public methods to help the reader understand what's going on.

[jrhizor]

@sherifnada I fixed the ArrayOneOfTestCase and added a NestedOneOfTestCase. Is this what you were talking about?

I also cleaned up the split function so that should be actually reviewable.

I'm going to add a ton of javadocs in the morning and slightly improve on some of the naming and then merge if there aren't any objections.