feat: Enable dark mode support using the "class" strategy in Tailwind configuration

Author: Darío Espinoza

tailwind.config.ts

@@ -4,6 +4,7 @@ export default {
   content: [
     "{routes,islands,components}/**/*.{ts,tsx,js,jsx}",
   ],
+  darkMode: "class", // Enables dark mode using the "class" strategy
   theme: {
     extend: {
       fontFamily: {