chore(playground): compodium setup

playground/compodium/examples/UAlert/UAlertExample.vue

@@ -0,0 +1,12 @@
+<script setup lang="ts">
+extendCompodiumMeta({
+  defaultProps: {
+    title: 'Heads up!',
+    description: 'You can change the primary color in your app config.'
+  }
+})
+</script>
+
+<template>
+  <UAlert />
+</template>