feat: add Vue2 exercises for dynamic styles, lifecycle methods, component communication, and course management dashboard

- Implement dynamic styles and event handling in Vue2 with a card component.
- Create lifecycle methods exercise to simulate async data loading and instance destruction.
- Develop a component communication exercise with props, events, and slots.
- Build a comprehensive course management dashboard with filtering, statistics, and component interactions.

07-vue2/02-template-bindings/answer.js

@@ -0,0 +1,16 @@
+new Vue({
+  el: "#app",
+  data: {
+    courseTitle: "Vue2 模板语法",
+    teacher: "李老师",
+    coverUrl: "https://picsum.photos/800/320?random=21",
+    courseLink: "https://cn.vuejs.org/",
+    isCollected: false,
+  },
+  methods: {
+    toggleCollect() {
+      this.isCollected = !this.isCollected;
+      console.log("收藏状态：", this.isCollected ? "已收藏" : "未收藏");
+    },
+  },
+});