Add a console.* API that invokes the HTML "report the error" algorithm (which calls window.onerror)

[annevk]

See https://lists.w3.org/Archives/Public/public-web-perf/2014Jun/0036.html and https://esdiscuss.org/topic/a-way-of-explicitly-reporting-exceptions for interest.

See https://www.w3.org/Bugs/Public/show_bug.cgi?id=26182 for the previous issue on this (merged into this new one since the idea seems to be to have it on console).

[zcorpan]

Need to consider workers and worklets also.

[annevk]

@zcorpan console is exposed to workers. Dunno about worklets.

[zcorpan]

Right, I mean we need to make sure this API invokes the right hooks in those contexts (or define to do nothing or throw if it shouldn't work there). https://html.spec.whatwg.org/multipage/workers.html#runtime-script-errors-2 is different from https://html.spec.whatwg.org/multipage/webappapis.html#runtime-script-errors-in-documents

[domenic]

Now that I realize this would trigger window.onerror I no longer think this is a console API, for what it's worth. Probably global.reportException(obj).

[domenic]

Trying to gather implementer interest over at whatwg/html#1196, for any implementers watching this repo.