feat: Add Vue3 exercises and interview plan

- Introduced Vue3 exercises covering composable API, reactivity, lifecycle hooks, and built-in components.
- Added structured interview plan for frontend candidates focusing on HTML, CSS, JavaScript, TypeScript, and Vue.
- Included starter files for each exercise and detailed README documentation for guidance.

08-vue3/13-script-setup-macros/starter.vue

@@ -0,0 +1,38 @@
+<template>
+  <article class="course-card">
+    <h2>{{ title }}</h2>
+    <p>{{ finished ? "已完成" : "学习中" }}</p>
+    <button ref="actionButton" type="button" @click="handleToggle">
+      切换状态
+    </button>
+  </article>
+</template>
+
+<script setup>
+import { ref } from "vue";
+
+// 任务：
+// 1. 用 defineProps 定义 title 和 finished
+// 2. 用 defineEmits 定义 toggle
+// 3. 点击按钮时触发 toggle
+// 4. 用 defineExpose 暴露 focusAction
+
+const actionButton = ref(null);
+
+function handleToggle() {
+  // 在这里触发 emit
+}
+
+function focusAction() {
+  actionButton.value?.focus();
+}
+</script>
+
+<style scoped>
+.course-card {
+  padding: 18px;
+  border-radius: 16px;
+  border: 1px solid #dbe4f1;
+  background: #fbfcfe;
+}
+</style>