feat: add Feishu notifier for message notifications

- Implemented a lightweight notification library with support for multiple channels.
- Added FeishuNotifier class to send messages via Feishu webhook.
- Created README documentation for usage and configuration of Feishu notifier.
- Added TypeScript configuration for the project.
- Included a test script for verifying Feishu message notifications.

.cnb/web_trigger.yml

@@ -0,0 +1,11 @@
+# .cnb/web_trigger.yml
+branch:
+  # 如下按钮在分支名以 release 开头的分支详情页面显示
+  - reg: "^main"
+    buttons:
+      - name: 同步代码到gitea
+        desc: 同步代码到gitea
+        event: web_trigger_sync_to_gitea
+      - name: 同步gitea代码到当前仓库
+        desc: 同步gitea代码到当前仓库
+        event: web_trigger_sync_from_gitea