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

.cursorrules

@@ -0,0 +1,17 @@
+# HealthLink-HIS AI Development Rules
+
+Read and follow RULES.md in the project root. It contains all iron rules and development standards.
+
+## Key Rules
+- All code changes must pass compilation tests before commit
+- Database changes must use Flyway migration scripts
+- Follow the layered architecture: Controller → AppService → Service → Mapper → Entity
+- API prefix: /healthlink-his/api/v1/
+- Package: com.healthlink.his
+- Backend: Spring Boot 4.0.6, JDK 25, MyBatis-Plus 3.5.16
+- Frontend: Vue 3, Vite, Element Plus, Pinia
+
+## File Structure
+- Backend: healthlink-his-server/
+- Frontend: healthlink-his-ui/
+- Docs: MD/ (all specs in MD/specs/)