Implement support for jiff

[NickKolpinski]

Summary

Implement support for jiff.

It's a somewhat new datetime library, inspired by JavaScript's Temporal. Unlike chrono and time, it supports TZif files out of the box, which is why I prefer it to the other two.

The PR is heavily based on the chrono implementation.

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided so that we can include it in CHANGELOG later
• For significant changes, documentation in README and https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[CLAassistant]

All committers have signed the CLA.

[NickKolpinski]

I just realized that BurntSushi wanted to release jiff 1.0 in the near future:

That is, I'd still like to get a jiff 1.0 release out this summer 2025 (in about 6 months) and then commit to it indefinitely.

While it's almost October, that still means that the release might be right around the corner. Let's put this PR on hold for now.