fix(config): resolve tailwind styles loss in bun environment

Change the export syntax in tailwind.config.js from CommonJS to ES modules.
This modification fixes the issue of missing Tailwind CSS styles when running
the application with bun.

Signed-off-by: Ivan Li <ivanli2048@gmail.com>

tailwind.config.js

@@ -1,7 +1,7 @@
 import defaultTheme from 'tailwindcss/defaultTheme';
 import typographyPlugin from '@tailwindcss/typography';
 
-module.exports = {
+export default {
   content: ['./src/**/*.{astro,html,js,jsx,json,md,mdx,svelte,ts,tsx,vue}'],
   theme: {
     extend: {