Fix multiple RespawnPlayerEvents issues

[Yeregorix]

1. New player instance was not captured properly (Recreate#entity() and Recreate#recreatedPlayer() were returning the same object).
2. Recreate#setDestinationPosition(Vector3d) was ignored (consequence of 1. ).
3. SelectWorld#setDestinationWorld() was ignored.
4. Post#originalDestinationWorld() and Post#destinationWorld() were returning incorrect values.
5. API ServerPlayer#respawn() was not firing SelectWorld but only Recreate and Post events.