console, util: add dirxml method

[Tiriel]

This is an absolute first draft.
This method was previously exposed by V8 (since Node v8.0.0) and not
implemented in Node directly.
Tests coming soon.

Refs: #17128

Please don't hesitate to leave me an advice. Tests are coming, and doc, but I first want to be sure I'm doing it right, or not bad at least.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

console, util

[apapirovski]

If we are implementing these then we should be following the spec as far as the arguments available go. https://console.spec.whatwg.org/#dirxml

[apapirovski]

In general, I think there's some confusion here around what dirxml is supposed to do. It takes a list of arguments and for each, formats it either as a DOM tree (if the item can be formatted as a DOM tree and the implementation supports it) or it applies minimal useful JS object formatting.

This means that it is not supposed to parse XML or anything similar. This is one of those methods that's a whole lot more useful in the browser because DOM nodes are just JS objects.

If we are implementing this in Node, then it should be very similar to dir except it can take many arguments. It should not accept any sort of params around options or xml parsing, as the spec does not allow for it.

[Tiriel]

@apapirovski You make quite a good point, and perhaps I misunderstood the method's purpose indeed. I'll try and rework this as you stated!

Thanks!

[Tiriel]

In fact, as I'm not touching utils anymore, I'm going to close this PR and open a new one I think.

Thanks again!