add ethernet information looks like openwrt 23.05 #340
+144
−53
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借鉴23.05版本的实现,做了一个精简版的实现。
效果如图所示。绿色表示全双工,橘黄色表示半双工。
由于没法获取每个lan口单独的流量,因此所有的lan口都显示br-lan的流量。