docs(input): add more examples

docs/app/components/content/examples/input/InputCopyButtonExample.vue

@@ -0,0 +1,33 @@
+<script setup lang="ts">
+const value = ref('npx nuxi module add ui')
+const copied = ref(false)
+
+function copy() {
+  navigator.clipboard.writeText(value.value)
+  copied.value = true
+
+  setTimeout(() => {
+    copied.value = false
+  }, 2000)
+}
+</script>
+
+<template>
+  <UInput
+    v-model="value"
+    :ui="{ trailing: 'pr-0.5' }"
+  >
+    <template v-if="value?.length" #trailing>
+      <UTooltip text="Copy to clipboard" :content="{ side: 'right' }">
+        <UButton
+          :color="copied ? 'success' : 'neutral'"
+          variant="link"
+          size="sm"
+          :icon="copied ? 'i-lucide-copy-check' : 'i-lucide-copy'"
+          aria-label="Copy to clipboard"
+          @click="copy"
+        />
+      </UTooltip>
+    </template>
+  </UInput>
+</template>