区分环境进行按需加载，提升本地开发加载速度。

更改侧边栏活跃色，让其和element-ui皮肤统一。
修复issue https://github.com/flipped-aurora/gin-vue-admin/issues/1347

web/vitePlugin/fullImport/fullImport.js

@@ -0,0 +1,25 @@
+import * as path from 'path'
+export default function fullImportPlugin() {
+  let config
+  return {
+    name: 'fullImportElementPlus',
+    async configResolved(conf) {
+      config = conf
+    },
+    transform(code, id) {
+      const sourcePath = path.join(config.root, 'src/main.js').split(path.sep).join('/')
+      const targetPath = id.split(path.sep).join('/')
+      if (sourcePath === targetPath) {
+        const name = 'ElementPlus'
+
+        // 引入 ElementPlus 和 样式
+        const prepend = `import ${name} from 'element-plus';\nimport 'element-plus/theme-chalk/src/index.scss';\n`
+
+        code = code.replace('.mount(', ($1) => `.use(${name})` + $1)
+        return prepend + code
+      }
+
+      return code
+    }
+  }
+}