Add behaviours for choice elements

[tiagosousagarcia]

Summary

Currently encountered a few <choice> elements (so far all with abbreviations) -- add options and behaviours to:

• Only display one or the other
• Display both
• Add typographic conventions for expansion

What needs to be done?

• Define behaviour
• Create options
• Write docs

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Updates

20240523 -- Corrected recursion problems and fixed other issues. TODO: documentation, tests; URGENT TODO: PR #21 Seems to have accidentally removed all behaviours for <orgName> -- Need to fix this. THIS IS WHY WE NEED AUTO TESTING! 😩
20240517 -- Finished draft behaviours for choice elements, separating between corrections and abbreviations. Inline markers work well; events also work but the behaviour is being called twice (once before anything, another after the expanded has been removed) -- need to fix this; also add documentation, test, and cover edge cases.