feat: 初始化知识库系统项目

- 实现基于 Laravel 11 和 Filament 3.X 的文档管理系统
- 添加用户认证和分组管理功能
- 实现文档上传、分类和权限控制
- 集成 Word 文档自动转换为 Markdown
- 集成 Meilisearch 全文搜索引擎
- 实现文档在线预览功能
- 添加安全日志和审计功能
- 完整的简体中文界面
- 包含完整的项目文档和部署指南

技术栈:
- Laravel 11.x
- Filament 3.X
- Meilisearch 1.5+
- Pandoc 文档转换
- Redis 队列系统
- Pest PHP 测试框架

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Knowledge Base System Contributors
+
+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.