dsh-git-conventions CN-WenYu

Configurable Git commit and pull-request conventions for DeepSeek Harness — enforce user-defined rules on commit messages and PR titles/descriptions. ｜ DeepSeek Harness 的可配置 Git 提交与拉取请求规范插件，按用户自定义规则校验提交信息与 PR 标题/描述。