feat: 添加AI开发规范自动加载配置 — 支持所有AI编码工具

单一信源设计:
- RULES.md: 项目唯一规范信源(218行,覆盖铁律+后端+前端规范)

多工具适配(7个配置文件):
- AGENTS.md: Codex CLI / Claude Code 自动读取
- .cursorrules: Cursor IDE 自动读取
- .github/copilot-instructions.md: GitHub Copilot 自动读取
- .windsurfrules: Windsurf/Codeium 自动读取
- .clinerules: Cline 自动读取
- .aider.conf.yml: Aider 自动读取
- .qwenrules: Qwen Coder/通义灵码 自动读取

子目录 AGENTS.md 同步更新引用 RULES.md

.qwenrules

@@ -0,0 +1,9 @@
+# HealthLink-HIS Development Rules
+
+Read RULES.md in the project root for all development standards and iron rules.
+
+This is a hospital information system (HIS) project.
+Backend: healthlink-his-server/ (Spring Boot 4.0.6, JDK 25)
+Frontend: healthlink-his-ui/ (Vue 3, Vite, Element Plus)
+Package: com.healthlink.his
+Always follow the iron rules defined in RULES.md.