init: 初始化项目文档中心

- 添加前端设计文档(rui-admin、收银系统、模块打包)
- 添加前端实施计划(收银后台功能完善)
- 添加通用规范(API、编码、数据库、前端开发规则)
- 建立文档索引和使用指南
This commit is contained in:
2026-06-04 08:47:08 +08:00
commit d0771597a6
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