Support `temporal` TC39 proposal

• FakeTimers version : 6.0.1
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Repo: https://github.com/tc39/proposal-temporal/

We should support faking out usage of all Temporal.now.* methods. Not sure if we need to fake anything else?

Note that I do not think we should support Temporal now - the proposal is still at stage 2. So consider this more of a tracking issue than something that’s actionable right now.

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[ljharb]

It is stage 3, but will not be shipped unflagged at this time, so it’ll be awhile.

You will only have to mock out Temporal.now, by design.

I would start implementing now, but perhaps hold off shipping it until at least one engine has landed it, or at least until a production-ready spec-compliant polyfill exists.

[SimenB]

You will only have to mock out Temporal.now, by design.

Wonderful 👍

I would start implementing now, but perhaps hold off shipping it until at least one engine has landed it, or at least until a production-ready spec-compliant polyfill exists.

If somebody is up for implementing it, I think we can also ship it as long as it’s clearly marked as unstable in docs and possibly code, e.g. unstable_enableTemporalSupport: boolean or something. Not sure, and I don’t feel strongly