@std/cbor: Temporal support

[petamoriken]

Since Deno now supports Temporal, it seems appropriate to add support for Temporal.Instant in @std/cbor. However, since it is still at Stage 4 and there are runtimes where it has not been implemented yet, the code needs to take that into account.

Additionally, since tags were expanded in RFC 8943 (Tags for Date) and RFC 9581 (Tags for Time, Duration, and Period), it might be good to add support for Temporal.PlainDate, Temporal.ZonedDateTime, Temporal.PlainDateTime, and Temporal.Duration.

For reference, here is a comment regarding native CBOR support on ES Discourse:
https://es.discourse.group/t/native-cbor-support/1492/11

[BlackAsLight]

Well this does sound good, my only concern is how we'd get around the lack of Temporal support for Deno v1. As to my understanding we are still supporting that range and therefore the TypeScript we ship would need to be compatible with it.

Safari also doesn't seem to support Temporal as of yet, so we'd want to make sure that any of our usage of the Temporal API is only on the condition that it exists and if not fall back to Date