add LanguageSwitcher component

src/components/LanguageSwitcher.vue

@@ -0,0 +1,20 @@
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+import { Button } from '@/components/ui/button'
+
+const { locale } = useI18n()
+
+const toggleLanguage = () => {
+  locale.value = locale.value === 'en' ? 'es' : 'en'
+}
+
+const getLanguageLabel = () => {
+  return locale.value === 'en' ? '🇪🇸 ES' : '🇺🇸 EN'
+}
+</script>
+
+<template>
+  <Button variant="ghost" size="sm" @click="toggleLanguage" class="gap-1">
+    {{ getLanguageLabel() }}
+  </Button>
+</template>