crea un controlador ryu que tenga las sigueintes reglas para ser ejecutado junto a una topologia mininet: Configuración de Reglas por VLAN​: VLAN 10: Aislamiento completo (bloqueo de tráfico externo). VLAN 20: Comunicación permitida con VLAN 30. VLAN 30: Comunicación permitida con VLAN 20. Configuración de QoS​: Prioridades de tráfico: Alta prioridad: 150 Mbps (para VoIP). Prioridad media: 100 Mbps (para tráfico HTTP). Baja prioridad: 50 Mbps (para tráfico general). Manejo de ACLs y Reglas de Control​: Bloqueo de tráfico externo para VLAN 10. Permitir comunicación entre VLAN 20 y VLAN 30. Identificación y gestión de tráfico por tipo (VoIP, HTTP, general). Función add_flow: Agrega flujos con prioridad específica y acciones determinadas.

Aquí te muestro un ejemplo de cómo crear un controlador Ryu que implemente las reglas que mencionaste:
```python
from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import MAIN_DISPATCHER, DEAD_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import vlan
from ryu.lib.packet import ipv4
from ryu.lib.packet import tcp
from ryu.lib.packet import udp
from ryu.lib.packet import icmp
from ryu.topology import event
from ryu.topology.api import get_link, get_switch, get_host
from ryu.topology.event import TopologyEvent
from ryu.controller import dpset
from ryu.controller import dpset
from ryu.lib import hub
from ryu.lib import mac
from ryu.lib import ip
from ryu.lib import utils
from ryu.lib import log
from ryu.lib import dpid as dpid_lib
from ryu.lib import ofctl_v1_3
from ryu.lib import ofctl_v1_3_parser
from ryu.lib import ofctl_v1_3
from ryu.lib import ofctl_v1_3_parser
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