refactor: update Node version and modernize config imports

Updates Node.js version to 22.12.0 for latest features
Converts Tailwind config to use ES modules instead of CommonJS
Simplifies plugin imports with direct named imports

This change modernizes the project configuration patterns

.node-version

@@ -1 +1 @@
-v20
+22.12.0

tailwind.config.mjs

@@ -1,7 +1,9 @@
 /** @type {import('tailwindcss').Config} */
-const { addDynamicIconSelectors } = require('@iconify/tailwind')
+import { addDynamicIconSelectors } from '@iconify/tailwind'
+import typography from '@tailwindcss/typography'
+import animate from 'tailwindcss-animate'
 
-module.exports = {
+export default {
   darkMode: ['class'],
   content: [
     './{app,components}/**/*.{html,js,jsx,md,mdx,ts,tsx}',
@@ -72,8 +74,8 @@ module.exports = {
     },
   },
   plugins: [
-    require('@tailwindcss/typography'),
-    require('tailwindcss-animate'),
+    typography,
+    animate,
     addDynamicIconSelectors(),
   ],
 }