refactor: 简化文件夹结构

build/plugin/unocss.js

@@ -0,0 +1,9 @@
+import Unocss from 'unocss/vite'
+import { presetUno, presetAttributify, presetIcons } from 'unocss'
+
+// https://github.com/antfu/unocss
+export function unocss() {
+  return Unocss({
+    presets: [presetUno(), presetAttributify(), presetIcons()],
+  })
+}