feat: setup Tailwind CSS and initial routing structure

Configure @tailwindcss/vite in Nuxt config
Add default layout and main CSS file
Create initial index and login pages
Replace default Nuxt welcome screen with page routing

app/pages/login/index.vue

@@ -0,0 +1,13 @@
+<template>
+  <div>
+    
+  </div>
+</template>
+
+<script lang="ts" setup>
+
+</script>
+
+<style>
+
+</style>