docs: 创建专业的项目 README 文档

详细说明:
- 添加完整的项目介绍和架构说明
- 包含 7 个 AI Agent 的详细介绍
- 添加技术栈和 Mermaid 架构图
- 完善安装和使用指南
- 添加开发指南和 Git 工作流
- 新增 Windows 快速部署文档
- 更新前端组件和启动脚本
- 添加多种环境配置文件

修改的文件:
- 新增 README.md 主文档
- 新增 doc/ 目录及部署文档
- 更新前端演示系统组件
- 添加多个启动脚本变体
- 配置文件优化

影响的功能模块:
- 项目文档体系
- 部署和启动流程
- 前端展示系统
- 环境配置管理

web_frontend/exhibition-demo/node_modules/set-cookie-parser/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Nathan Friedly <nathan@nfriedly.com> (http://nfriedly.com/)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.