docs: 添加多智能体头脑风暴工作流说明到入门指南

### 新增内容

**GETTING_STARTED.md** (英文):
- 添加"Scenario 4: Multi-Agent Brainstorming"场景示例
- 说明 `/workflow:brainstorm:auto-parallel` 命令的工作原理
- 列出 9 个可用专家角色（技术、产品设计、敏捷质量、API设计）
- 解释工作流的 4 个阶段（框架生成、并行分析、综合整合、行动计划）
- 提供使用时机指导

**GETTING_STARTED_CN.md** (中文):
- 添加"场景 4：多智能体头脑风暴"场景示例
- 包含与英文版相同的详细说明和中文翻译
- 专家角色的中文注释（如"系统架构师"、"UI设计师"等）

### 功能亮点

**多智能体头脑风暴特性**:
- 自动角色选择：基于主题关键词智能选择专家角色
- 并行执行：多个 AI 智能体同时从不同视角分析
- 灵活配置：支持 `--count` 参数控制角色数量（默认 3，最大 9）
- 综合输出：生成包含跨角色洞察的完整规格说明

**示例命令**:
```bash
/workflow:brainstorm:auto-parallel "设计实时协作文档编辑系统"
/workflow:brainstorm:auto-parallel "构建可扩展微服务平台" --count 5
```

### 改进用户体验

这些更新帮助用户：
1. 了解何时使用头脑风暴工作流
2. 理解多视角分析的价值
3. 掌握头脑风暴到实现的完整流程
4. 根据项目复杂度选择合适的工具

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

GETTING_STARTED.md

@@ -121,6 +121,41 @@ CCW can help you analyze and fix bugs.
 /workflow:execute
 ```
 
+### Scenario 4: Multi-Agent Brainstorming
+
+Before implementing complex features, use multi-agent brainstorming to explore different perspectives and generate comprehensive specifications.
+
+```bash
+# Automatic role selection and parallel analysis (auto-creates session)
+/workflow:brainstorm:auto-parallel "Design a real-time collaborative document editing system with conflict resolution"
+
+# Specify number of expert roles (default: 3, max: 9)
+/workflow:brainstorm:auto-parallel "Build scalable microservices platform" --count 5
+```
+
+**How It Works**:
+- **Auto role selection**: Analyzes your topic and selects relevant expert roles
+- **Parallel execution**: Multiple AI agents analyze simultaneously from different perspectives
+- **Comprehensive output**: Generates integrated specification with cross-role insights
+
+**Available Expert Roles**:
+- Technical: `system-architect`, `data-architect`, `subject-matter-expert`
+- Product & Design: `ui-designer`, `ux-expert`, `product-manager`, `product-owner`
+- Agile & Quality: `scrum-master`, `test-strategist`
+- API Design: `api-designer`
+
+**Workflow Phases**:
+1. **Framework Generation**: Creates structured discussion framework
+2. **Parallel Analysis**: Multiple experts analyze simultaneously
+3. **Synthesis**: Integrates all perspectives into comprehensive specification
+4. **Action Planning**: Use `/workflow:plan` to generate implementation tasks
+
+**When to Use**:
+- Complex features requiring multiple perspectives
+- Architectural decisions with significant impact
+- New product features needing comprehensive analysis
+- When you want thorough requirements and design specifications
+
 ---
 
 ## 🔧 Workflow-Free Usage: Standalone Tools