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/06-bubbling-and-delegation/answer.js

@@ -0,0 +1,27 @@
+const panel = document.getElementById("panel");
+const lessonList = document.getElementById("lesson-list");
+
+panel.addEventListener("click", function () {
+  console.log("点击到了外层面板");
+});
+
+lessonList.addEventListener("click", function (event) {
+  const removeButton = event.target.closest(".remove-btn");
+
+  if (removeButton) {
+    event.stopPropagation();
+    const currentItem = removeButton.closest(".lesson-item");
+
+    if (currentItem) {
+      currentItem.remove();
+    }
+
+    return;
+  }
+
+  const currentItem = event.target.closest(".lesson-item");
+
+  if (currentItem) {
+    currentItem.classList.toggle("active");
+  }
+});