[Feature] DNS ECS support about mihomo HOT 5 CLOSED

done ecbbf9d

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#342

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It's quite challenging to implement this unless the host running Mihomo has a public IP address. Otherwise, Go will need to rely on an external service to retrieve the public IP address of the host.

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好像只有谷歌的 ECS 体验还可以，不过就这个也够了

# 深圳网段(120.76.0.0/14) 杭州网段(223.4.0.0/14) 成都网段(47.108.0.0/15) 上海网段(47.100.0.0/14) 青岛网段(47.104.0.0/15) 北京网段(101.200.0.0/15)
      - 'https://dns.google/dns-query#Proxy&ecs=120.76.0.0/14&ecs-override=true'

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好像只有谷歌的 ECS 体验还可以，不过就这个也够了

# 深圳网段(120.76.0.0/14) 杭州网段(223.4.0.0/14) 成都网段(47.108.0.0/15) 上海网段(47.100.0.0/14) 青岛网段(47.104.0.0/15) 北京网段(101.200.0.0/15)
      - 'https://dns.google/dns-query#Proxy&ecs=120.76.0.0/14&ecs-override=true'

Yes, I test it like this, it works very well. all domain will resolve by your proxy remotely. And the returned resolved CDN IP is also very accurate.
nameserver: [
"https://8.8.8.8/dns-query#ecs-ovveride=true&ecs=1.0.1.0&proxy",
"https://8.8.4.4/dns-query#ecs-ovveride=true&ecs=1.0.1.0&proxy",
]
This is a feature worth promoting, thank you for your efforts @wwqgtxx

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