新增实时监控功能

左边是设备通道树，右边是分屏预览

web_src/src/api/deviceApi.js

@@ -0,0 +1,19 @@
+import axios from 'axios';
+
+export const tree = (deviceId) => {
+  return axios({
+    url: `/api/device/query/${deviceId}/tree`,
+    method: 'get'
+  })
+}
+
+export const deviceList = (page, count) => {
+  return axios({
+    method: 'get',
+    url:`/api/device/query/devices`,
+    params: {
+      page,
+      count
+    }
+  })
+}