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/05-promise-basics/starter.js

@@ -0,0 +1,12 @@
+function loadTracks() {
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      resolve(["模板字符串", "模块化", "async/await"]);
+    }, 700);
+  });
+}
+
+// 任务：
+// 1. 调用 loadTracks()
+// 2. 成功时更新状态和输出内容
+// 3. 失败时更新状态