perf: 将本地图标全部按需引入，首屏加载减少 61 个图标资源，首屏加载再次变快 (#389)

* perf: 优化图标，将本地图标按需引入，首屏加载减少 `61` 个图标资源，首屏加载再次变快

src/router/modules/flowchart.ts

@@ -1,11 +1,12 @@
 import { $t } from "@/plugins/i18n";
 import { flowchart } from "@/router/enums";
+import SetUp from "@iconify-icons/ep/set-up";
 
 export default {
   path: "/flowChart",
   redirect: "/flowChart/index",
   meta: {
-    icon: "set-up",
+    icon: SetUp,
     title: $t("menus.hsflowChart"),
     rank: flowchart
   },