[web-app]监控详情添加帮助链接

web-app/src/app/routes/monitor/monitor-detail/monitor-detail.component.html

@@ -15,6 +15,10 @@
   <nz-breadcrumb-item>
     <i nz-icon nzType="pie-chart"></i>
     <span>{{ 'monitor.app.' + app | i18n }} 监控详情</span>
+    <a [href]="'https://tancloud.cn/docs/help/' + monitor.app" target="_blank" style="float: right; margin-right: 5%">
+      <span>帮助&nbsp;</span>
+      <i nz-icon nzType="question-circle" nzTheme="outline"></i>
+    </a>
   </nz-breadcrumb-item>
 </nz-breadcrumb>
 <nz-divider></nz-divider>