feat: 引入并注册ElementPlus组件库

src/global/registerElement.js

@@ -0,0 +1,22 @@
+import 'element-plus/theme-chalk/base.css'
+import 'element-plus/theme-chalk/dark/css-vars.css'
+import 'element-plus/theme-chalk/el-overlay.css'
+import { ElButton, ElMessageBox } from 'element-plus'
+
+const components = [ElButton, ElMessageBox]
+
+export default function registerElement(app) {
+  components.forEach((c) => {
+    let name = transferCamel(c.name)
+    if (name === 'message-box') name = 'el-message-box'
+    require(`element-plus/theme-chalk/${name}.css`)
+    app.component(name, c)
+  })
+}
+
+function transferCamel(camel) {
+  return camel
+    .replace(/([A-Z])/g, '-$1')
+    .toLowerCase()
+    .slice(1)
+}