Improve support for XML lists via `JsonNode`

Hello. I understand that Jackson 3 plans to better support formats other than JSON. In particular, for XML, it would be nice to have a method like `JsonNode.getArray(String element)` to get XML node lists in `ArrayNode` format automatically, even for 1 element lists which are currenty returned by `JsonNode.get("element")` as an `ObjectNode`. For more context please see [this SO question](https://stackoverflow.com/questions/79274373/how-to-parse-xml-lists-with-jackson-without-a-special-case-for-1-element-lists). Thanks!