feat: 新增 Java DTO Lombok 规范和前端样式管理规范

- java-dev 新增 DTO/VO 类规范，禁止手写 getter/setter
  - frontend-dev 新增样式管理规范，vue/tsx 样式抽到 assets/styles
  - frontend-dev 目录结构补充 assets/styles 目录
  - Dockerfile 模板升级 Go 和 Alpine 版本号

README.md

@@ -9,7 +9,7 @@
 >
 > 按费力度从低到高，用最少操作获得最大帮助
 
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