[WIP] Add English Version Document

English documents are very important to users, especially foreign users. We can translate Chinese documents into English together so that more people can use FreeSql.

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List of documents waiting for translation:

- [ ] 基础文档
- [x] 入门
- [x] 安装
- [x] 添加
- [x] 单条添加
- [x] 批量添加
- [x] 删除
- [x] 修改
- [x] 更新实体
- [x] 指定列更新
- [x] 添加或修改
- [x] 查询
- [x] 分页
- [x] 单表
- [x] 多表
- [x] 分组聚合
- [ ] 嵌套查询 https://github.com/dotnetcore/FreeSql/wiki/Nested-Query
- [x] 返回数据
- [x] 延时加载
- [x] 贪婪加载
- [x] LinqToSql
- [x] WithSql
- [x] 查询父子关系
- [x] 仓储层Repository
- [x] UnitOfWork
- [x] 联级保存
- [ ] 级联删除 https://github.com/dotnetcore/FreeSql/wiki/Cascade-Deletion
- [x] UnitOfWorkManager
- [ ] DbContext
- [ ] CodeFirst
- [ ] 实体特性
- [ ] FluentApi
- [ ] 自定义特性
- [ ] 类型映射
- [x] 导航配置
- [x] 导入数据库特性
- [ ] 迁移结构
- [ ] DbFirst
- [ ] 表达式函数]
- [ ] 字符串]
- [ ] 日期/时间]
- [ ] 其他]
- [ ] 自定义函数
- [ ] 事务
- [ ] 过滤器
- [ ] AOP
- [ ] 读写分离
- [ ] 分表分库
- [ ] 租户
- [ ] 性能
- [ ] 动态操作 https://github.com/dotnetcore/FreeSql/wiki/Dynamic-Operations
- [ ] 你不知道的功能
- [ ] API参考

- [ ] 使用指南
- [ ] Dapper比较
- [ ] EntityFramework比较

- [ ] 学习与交流
- [ ] 常见问题