* Move Ulam spiral generator to its own class
* Make UlamSpiral.Point return a zero vector for n<=0
* Add UlamSpiral.PointsForMaxDistance
* Fix TeleportLocationsSystem can teleport user into a wall
Uses an Ulam spiral pattern to check for valid locations around the target entity.
* Handle teleportation failures more gracefully
* Fix unconventional name for delay system field
* Fix client crashes when target entity is paused/in nullspace
* Show popup when teleportation destination is obstructed
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Co-authored-by: opl <4833621+opl@users.noreply.github.com>
