chore(playground): compodium setup

playground/compodium/examples/UButton/UButtonExampleAvatar.vue

@@ -0,0 +1,12 @@
+<script setup lang="ts">
+extendCompodiumMeta({
+  combo: ['size', 'variant'],
+  defaultProps: {
+    avatar: { src: 'https://github.com/benjamincanac.png' }
+  }
+})
+</script>
+
+<template>
+  <UButton />
+</template>