feat: add TypeScript lessons and learning panel

- Introduced a new script to check TypeScript lesson files for errors.
- Created a main TypeScript file to render lessons and their details.
- Added lesson definitions with starter and answer codes.
- Implemented a user interface for navigating and running lessons.
- Styled the application with CSS for a better user experience.
- Updated README to reflect the new TypeScript section and usage instructions.

05-es6-plus/09-final-modern-js/starter.js

@@ -0,0 +1,7 @@
+// 任务：
+// 1. 从 ./summary-service.js 导入数据
+// 2. 用 async / await 获取额外技能
+// 3. 解构 name、stage、skills
+// 4. 用展开运算符合并技能
+// 5. 用模板字符串渲染标题和说明
+// 6. 用 forEach 或 map + 箭头函数渲染列表