Check teleport permission before teleporting in /tpworld

[Smorki]

The /tpworld <world> [player] command teleports the target player before checking the essentials.tp.world.other permission.

This means a player with only essentials.tp.world (but not .other) can still teleport other players to any world — they just get a NO_PERMISSION message after the teleport has already happened.

Steps to reproduce:

1. Give a player essentials.tp.world but NOT essentials.tp.world.other
2. Run /tpworld world_nether OtherPlayer
3. OtherPlayer is teleported to the nether, sender sees "no permission"

Fix: move the permission check above the teleportAsync call, so unauthorized senders are rejected before the teleport is triggered.