Add quota dots to screen and color-code people count

- And try to remove survivors after doors close with queue_free
- And move panel?? Still not right.

scenes/elevator.gd

@@ -24,6 +24,7 @@ func _on_doors_opened():
 func _on_doors_closed(fast: bool):
 	_set_door_collision(true)
 	_tween_doors(DOOR_CLOSED_X, DOOR_FAST_CLOSE_TIME if fast else DOOR_DEFAULT_TIME)
+	_tween.chain().tween_callback(func(): EventBus.doors_fully_closed.emit())
 
 func _on_pulse_started(duration: float):
 	_set_door_collision(true)