feat: 新增CWD评论系统前后端代码及文档

refactor: 移除旧版评论系统代码并重构为Vue3前端

docs: 更新后端配置文档说明

fix: 修复评论提交频率限制和邮件通知逻辑

style: 格式化代码并优化样式

test: 添加Vitest测试配置

build: 更新依赖项和构建配置

chore: 清理无用文件和缓存

cwd-comments-api/wrangler.jsonc.example

@@ -0,0 +1,15 @@
+/**
+ * For more details on how to configure Wrangler, refer to:
+ * https://developers.cloudflare.com/workers/wrangler/configuration/
+ */
+{
+	"$schema": "node_modules/wrangler/config-schema.json",
+	"name": "cwd-comments",
+	"main": "src/index.ts",
+	"compatibility_date": "2026-01-03",
+	"observability": {
+		"enabled": true
+	},
+	"workers_dev": true,
+	"preview_urls": true
+}