feat: PWA using @vite-pwa/nuxt module with auto update strategy (#75)

Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

components/DarkToggle.vue

@@ -1,6 +1,14 @@
 <script setup lang="ts">
 const color = useColorMode()
 
+useHead({
+  meta: [{
+    id: 'theme-color',
+    name: 'theme-color',
+    content: () => color.value === 'dark' ? '#222222' : '#ffffff',
+  }],
+})
+
 function toggleDark() {
   color.preference = color.value === 'dark' ? 'light' : 'dark'
 }