examples: add confirm delete example (#1466)

* examples: add confirm delete example

* docs: add confirm delete example

docs/examples/confirm-delete/Dialog.vue

@@ -0,0 +1,57 @@
+<script setup>
+import { useDialogState } from './useDialog.js'
+
+const { isVisible, message, resolve } = useDialogState()
+
+function confirm() {
+  resolve(true)
+  isVisible.value = false
+}
+
+function cancel() {
+  resolve(false)
+  isVisible.value = false
+}
+</script>
+
+<template>
+  <div v-if="isVisible" class="dialog-overlay">
+    <div class="dialog">
+      <p>{{ message }}</p>
+
+      <div class="dialog-actions">
+        <button @click="confirm">Confirm</button>
+        <button @click="cancel">Cancel</button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<style>
+.dialog-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: rgba(0, 0, 0, 0.5);
+  z-index: 1000;
+}
+
+.dialog {
+  background: white;
+  padding: 20px;
+  border-radius: 5px;
+  text-align: center;
+}
+
+.dialog-actions {
+  margin-top: 20px;
+  display: flex;
+  justify-content: center;
+  gap: 8px;
+}
+</style>