feat: vite-plugin-svg-icons引入

1. vite-plugin-svg-icons引入
2. vite.config.ts读取环境变量
3. vite配置跨域

src/main.ts

@@ -8,11 +8,10 @@ import ElementPlus from 'element-plus'
 import 'element-plus/dist/index.css'
 
 
-import SvgIcon from './icons/index.vue'
+import 'virtual:svg-icons-register';
 
 const app=createApp(App)
 app
-    .component('svg-icon', SvgIcon)
     .use(router)
     .use(store,key)
     .use(ElementPlus)