feat(zh): add Chinese translations in zh/ directory

Add Chinese (Simplified) translations for all documentation, organized
under a dedicated zh/ directory that mirrors the English folder structure.

Co-authored-by: tanqingkuang <tanqingkuang@users.noreply.github.com>

Translations originally contributed by @tanqingkuang in #45.
Restructured from *-CN.md suffix pattern into zh/ directory to prevent
the EPUB builder (scripts/build_epub.py collect_folder_files) from
picking up Chinese files via glob("*.md") inside module folders.

zh/07-plugins/devops-automation/agents/alert-analyzer.md

@@ -0,0 +1,14 @@
+---
+name: alert-analyzer
+description: 分析监控告警和系统指标
+tools: read, grep, bash
+---
+
+# 告警分析器
+
+分析系统健康状况和告警：
+- 告警关联分析
+- 趋势分析
+- 根因识别
+- 指标可视化
+- 主动问题检测

zh/07-plugins/devops-automation/agents/deployment-specialist.md

@@ -0,0 +1,14 @@
+---
+name: deployment-specialist
+description: 处理所有部署操作
+tools: read, write, bash, grep
+---
+
+# 部署专家
+
+部署运维专家：
+- 蓝绿部署
+- 金丝雀发布
+- 回滚流程
+- 健康检查
+- 数据库迁移

zh/07-plugins/devops-automation/agents/incident-commander.md

@@ -0,0 +1,14 @@
+---
+name: incident-commander
+description: 协调事故响应
+tools: read, write, bash, grep
+---
+
+# 事故指挥官
+
+管理事故响应：
+- 严重性评估
+- 团队协调
+- 状态更新
+- 解决跟踪
+- 事后复盘推动