Server/PacketIO: Added Opcode SMSG_NEW_WORLD & Updated Structure and commented on CMSG_AREATRIGGER

Signed-off-by: AriDEV <aridev666@gmail.com>
Server/PacketIO: Updated SMSG_TRANSFER_PENDING Opcode & Stucture

Signed-off-by: AriDEV <aridev666@gmail.com>
Server/PacketIO: Added MSG_MOVE_WORLDPORT_ACK Opcode

Signed-off-by: AriDEV <aridev666@gmail.com>
Server/PacketIO: Added CMSG_SET_SELECTION Opcode & Structure

Signed-off-by: AriDEV <aridev666@gmail.com>