feat: add frontend development guidelines and structure documentation

- Introduced API guidelines for interface contracts and request handling.
- Added design tokens usage guidelines for consistent styling across the project.
- Established DTO guidelines for defining request parameters and response data types.
- Created frontend structure guidelines to clarify directory organization and code placement rules.
- Compiled a comprehensive frontend development guideline document covering various aspects of the development process.
- Implemented quality guidelines to ensure code maintainability and adherence to best practices.

AI-RD-Workflow/30-templates/intake.md

@@ -0,0 +1,30 @@
+---
+id: INTAKE-yyyymmdd-nnn
+case_id: REQ-yyyymmdd-nnn-short-name
+type: intake
+stage: user-requirement
+owner_role: PM
+status: draft
+source_ids: []
+derived_ids: []
+created: yyyy-mm-dd
+updated: yyyy-mm-dd
+---
+
+# 原始输入
+
+## 背景
+
+## 原始描述
+
+## 目标用户
+
+## 当前问题
+
+## 期望结果
+
+## 约束
+
+## 已知材料
+
+## 待确认问题