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>

plugins/superclaude/commands/document.md

@@ -0,0 +1,88 @@
+---
+name: document
+description: "Generate focused documentation for components, functions, APIs, and features"
+category: utility
+complexity: basic
+mcp-servers: []
+personas: []
+---
+
+# /sc:document - Focused Documentation Generation
+
+## Triggers
+- Documentation requests for specific components, functions, or features
+- API documentation and reference material generation needs
+- Code comment and inline documentation requirements
+- User guide and technical documentation creation requests
+
+## Usage
+```
+/sc:document [target] [--type inline|external|api|guide] [--style brief|detailed]
+```
+
+## Behavioral Flow
+1. **Analyze**: Examine target component structure, interfaces, and functionality
+2. **Identify**: Determine documentation requirements and target audience context
+3. **Generate**: Create appropriate documentation content based on type and style
+4. **Format**: Apply consistent structure and organizational patterns
+5. **Integrate**: Ensure compatibility with existing project documentation ecosystem
+
+Key behaviors:
+- Code structure analysis with API extraction and usage pattern identification
+- Multi-format documentation generation (inline, external, API reference, guides)
+- Consistent formatting and cross-reference integration
+- Language-specific documentation patterns and conventions
+
+## Tool Coordination
+- **Read**: Component analysis and existing documentation review
+- **Grep**: Reference extraction and pattern identification
+- **Write**: Documentation file creation with proper formatting
+- **Glob**: Multi-file documentation projects and organization
+
+## Key Patterns
+- **Inline Documentation**: Code analysis → JSDoc/docstring generation → inline comments
+- **API Documentation**: Interface extraction → reference material → usage examples
+- **User Guides**: Feature analysis → tutorial content → implementation guidance
+- **External Docs**: Component overview → detailed specifications → integration instructions
+
+## Examples
+
+### Inline Code Documentation
+```
+/sc:document src/auth/login.js --type inline
+# Generates JSDoc comments with parameter and return descriptions
+# Adds comprehensive inline documentation for functions and classes
+```
+
+### API Reference Generation
+```
+/sc:document src/api --type api --style detailed
+# Creates comprehensive API documentation with endpoints and schemas
+# Generates usage examples and integration guidelines
+```
+
+### User Guide Creation
+```
+/sc:document payment-module --type guide --style brief
+# Creates user-focused documentation with practical examples
+# Focuses on implementation patterns and common use cases
+```
+
+### Component Documentation
+```
+/sc:document components/ --type external
+# Generates external documentation files for component library
+# Includes props, usage examples, and integration patterns
+```
+
+## Boundaries
+
+**Will:**
+- Generate focused documentation for specific components and features
+- Create multiple documentation formats based on target audience needs
+- Integrate with existing documentation ecosystems and maintain consistency
+
+**Will Not:**
+- Generate documentation without proper code analysis and context understanding
+- Override existing documentation standards or project-specific conventions
+- Create documentation that exposes sensitive implementation details