feat: restore all 30 slash commands with comprehensive documentation

Restored 26 additional commands from commit d4a17fc, bringing total from 5 to 30 commands.

## New Commands Added (26):
- /analyze - Code and architecture analysis
- /brainstorm - Structured brainstorming sessions
- /build - Build and compilation workflows
- /business-panel - Multi-expert business analysis
- /cleanup - Code cleanup and refactoring
- /design - System design and architecture
- /document - Documentation generation
- /estimate - Effort and time estimation
- /explain - Code explanation
- /git - Git operations and workflows
- /help - Command help and usage
- /implement - Implementation workflows
- /improve - Code improvement suggestions
- /index - Project indexing (alias for index-repo)
- /load - Load saved sessions
- /pm - Project management workflows
- /reflect - Reflection and retrospectives
- /save - Save current session
- /select-tool - Tool selection guidance
- /spawn - Spawn parallel tasks
- /spec-panel - Multi-expert specification analysis
- /task - Task management
- /test - Testing workflows
- /troubleshoot - Debugging and troubleshooting
- /workflow - Custom workflow automation

## Documentation Updates:
- Created docs/reference/commands-list.md with categorized command reference
- Updated README.md with expandable 30-command list
- Updated README-zh.md with Chinese translations
- Updated README-ja.md with Japanese translations
- Updated README-kr.md with Korean translations
- Changed statistics: "3 plugins" → "30 commands"
- Added command categories: Planning & Design, Development, Testing & Quality,
  Documentation, Version Control, Project Management, Research & Analysis, Utilities

## Files Changed:
- 60 files changed, 7930 insertions(+), 267 deletions(-)
- Added 26 commands to plugins/superclaude/commands/
- Added 26 commands to src/superclaude/commands/
- Created comprehensive command documentation

Commands restored from: d4a17fc (superclaude/commands/)
Total: 30 commands now available

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

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

README-zh.md

@@ -51,12 +51,12 @@
 
 ## 📊 **框架统计**
 
-| **插件** | **智能体** | **模式** | **MCP服务器** |
+| **命令** | **智能体** | **模式** | **MCP服务器** |
 |:------------:|:----------:|:---------:|:---------------:|
-| **3** | **16** | **7** | **8** |
-| 插件命令 | 专业AI | 行为模式 | 集成服务 |
+| **30** | **16** | **7** | **8** |
+| 斜杠命令 | 专业AI | 行为模式 | 集成服务 |
 
-三个核心插件：**PM Agent**（编排）、**Research**（网络搜索）、**Index**（上下文优化）。
+30个斜杠命令覆盖从头脑风暴到部署的完整开发生命周期。
 
 </div>
 
@@ -548,3 +548,60 @@ SuperClaude v4.2引入了全面的深度研究能力，实现自主、自适应
 </p>
 
 </div>
+
+---
+
+## 📋 **全部30个命令**
+
+<details>
+<summary><b>点击展开完整命令列表</b></summary>
+
+### 🧠 规划与设计 (4)
+- `/brainstorm` - 结构化头脑风暴
+- `/design` - 系统架构
+- `/estimate` - 时间/工作量估算
+- `/spec-panel` - 规格分析
+
+### 💻 开发 (5)
+- `/implement` - 代码实现
+- `/build` - 构建工作流
+- `/improve` - 代码改进
+- `/cleanup` - 重构
+- `/explain` - 代码解释
+
+### 🧪 测试与质量 (4)
+- `/test` - 测试生成
+- `/analyze` - 代码分析
+- `/troubleshoot` - 调试
+- `/reflect` - 回顾
+
+### 📚 文档 (2)
+- `/document` - 文档生成
+- `/help` - 命令帮助
+
+### 🔧 版本控制 (1)
+- `/git` - Git操作
+
+### 📊 项目管理 (3)
+- `/pm` - 项目管理
+- `/task` - 任务跟踪
+- `/workflow` - 工作流自动化
+
+### 🔍 研究与分析 (2)
+- `/research` - 深度网络研究
+- `/business-panel` - 业务分析
+
+### 🎯 实用工具 (9)
+- `/agent` - AI智能体
+- `/index-repo` - 仓库索引
+- `/index` - 索引别名
+- `/recommend` - 命令推荐
+- `/select-tool` - 工具选择
+- `/spawn` - 并行任务
+- `/load` - 加载会话
+- `/save` - 保存会话
+- `/sc` - 显示所有命令
+
+[**📖 查看详细命令参考 →**](docs/reference/commands-list.md)
+
+</details>