* Identify owner for a timeslot and check busyness against his schedule only
* Fix TS errors
* Fix flatmap
* Fix xisting unit tests
* Prevent duplicate slots by merging, userId -> userIds (multi)
* Small fix to potential undefined
* Moved duplicate prevention to buildSlots function
* Apply date override on a per user basis
* Prevent -1 being added to computedLocalAvailability
* Removed console.log
* Apply override properly on COLLECTIVE
* Default timeZone to UTC when undefined
* isSame doesn't work when the day shifts, isBetween instead
* Iterate over all slot.userIds schedules to identify the first user schedule that matches
* add round-robin test
Co-authored-by: Alex van Andel <me@alexvanandel.com>
Co-authored-by: Peer Richelsen <peeroke@gmail.com>
