* fix: show observation datetime in the obs time zone
I.e. it doesn't offset the observation datetime into the viewer's time zone.
* test: adjust to literal times by default
* chore: update to date-fns 3.0
* wip: show time zone names with all times
* show time zone name whenever a time zone is passed to a formatting function
* store observation IANA time zone in Realm
Note that this required patching around a bug in Hermes in which it should be
returning a GMT offset for the short time zone but is instead just returning
GMT.
* fix: omit time zone for unuploaded obs
* feat: show relative time differences on ActivityItem headers
* fix: hide zone/offset on ObsEdit before upload when signed in
* fix: hide clock icon in activity item header in new default mode
Also
* stop using checkCamelAndSnakeCase when not necessary in DetailsTab.js
* make POJO types only refer to other POJO types
