TODO

jiff
- jiff until methods
- jiff offset object testing
- pydatetime comparisons? I dont know if this is a good idea
- rename Span to TimeSpan in jiff module as it is clearer?
- MAYBE rename Zoned to ZonedDatetime in jiff?
- convert all jiff python conversions to use the jiff-new-type pattern

DONE

python datetime.timedelta conversions for ryo3-jiff
cleanup naming in pydatetime conversions for ryo3-jiff
hashes for ryo3-jiff objects