feat(Chip): new component (#886)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/components/content/examples/ChipExampleContentSlot.vue

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+<template>
+  <UChip size="md" position="bottom-right" inset :ui="{ base: '-mx-2 rounded-none ring-0', background: '' }">
+    <UAvatar
+      src="https://avatars.githubusercontent.com/u/739984?v=4"
+      alt="Avatar"
+      size="lg"
+    />
+
+    <template #content>
+      <UAvatar
+        src="https://avatars.githubusercontent.com/in/80442?v=4"
+        alt="Avatar"
+        size="xs"
+        :ui="{ rounded: 'rounded-md' }"
+        class="shadow-md"
+      />
+    </template>
+  </UChip>
+</template>

docs/components/content/examples/ChipExampleShow.vue

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+<script setup>
+const items = [{
+  name: 'messages',
+  icon: 'i-heroicons-chat-bubble-oval-left',
+  count: 3
+}, {
+  name: 'notifications',
+  icon: 'i-heroicons-bell',
+  count: 0
+}]
+</script>
+
+<template>
+  <div class="flex gap-3">
+    <UChip v-for="{ name, icon, count } in items" :key="name" :show="count > 0">
+      <UButton :icon="icon" color="gray" />
+    </UChip>
+  </div>
+</template>