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.

04-dom-events-async/01-query-selectors/starter.js

@@ -0,0 +1,5 @@
+// 任务：
+// 1. 用 getElementById 获取标题
+// 2. 用 querySelector 获取按钮
+// 3. 用 querySelectorAll 获取全部卡片
+// 4. 在控制台输出标题文字、按钮文字和卡片数量