[whatwg/dom] Add `beforeopen`, `afteropen`, `beforeclosed`, and `afterclosed` events? (Issue #1118)

The CSSWG [recently resolved to add `:open` and `:closed` pseudo classes](https://github.com/w3c/csswg-drafts/issues/7319#issuecomment-1276473056). These will apply to anything that can open/close, which includes `<dialog>`, `<details>`, and `<select>`, and also [the pop-up API](https://open-ui.org/components/popup.research.explainer) (see [DOM](https://github.com/whatwg/dom/pull/1117) and [html](https://github.com/whatwg/html/pull/8221) PRs). For the pop-up API, there is a need for events that fire when these states change. In OpenUI, we [recently discussed the naming for these events](https://github.com/openui/open-ui/issues/607#issuecomment-1278045033), and resolved that we'd prefer to make this a more general set of events that should apply to anything that can be "open"/"closed".

For the pop-up API, there is only the need for events that happen **before** the state changes, and interestingly only the "opening" event is cancelable. However, in the general case, it would seem that we should add four events, two for before/after the state changes to "open" and two for "closed".

Thoughts? Are there precedents, suggestions, or requirements for the naming of these four events?

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