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/index.md

@@ -0,0 +1,86 @@
+---
+name: index
+description: "Generate comprehensive project documentation and knowledge base with intelligent organization"
+category: special
+complexity: standard
+mcp-servers: [sequential, context7]
+personas: [architect, scribe, quality]
+---
+
+# /sc:index - Project Documentation
+
+## Triggers
+- Project documentation creation and maintenance requirements
+- Knowledge base generation and organization needs
+- API documentation and structure analysis requirements
+- Cross-referencing and navigation enhancement requests
+
+## Usage
+```
+/sc:index [target] [--type docs|api|structure|readme] [--format md|json|yaml]
+```
+
+## Behavioral Flow
+1. **Analyze**: Examine project structure and identify key documentation components
+2. **Organize**: Apply intelligent organization patterns and cross-referencing strategies
+3. **Generate**: Create comprehensive documentation with framework-specific patterns
+4. **Validate**: Ensure documentation completeness and quality standards
+5. **Maintain**: Update existing documentation while preserving manual additions and customizations
+
+Key behaviors:
+- Multi-persona coordination (architect, scribe, quality) based on documentation scope and complexity
+- Sequential MCP integration for systematic analysis and comprehensive documentation workflows
+- Context7 MCP integration for framework-specific patterns and documentation standards
+- Intelligent organization with cross-referencing capabilities and automated maintenance
+
+## MCP Integration
+- **Sequential MCP**: Complex multi-step project analysis and systematic documentation generation
+- **Context7 MCP**: Framework-specific documentation patterns and established standards
+- **Persona Coordination**: Architect (structure), Scribe (content), Quality (validation)
+
+## Tool Coordination
+- **Read/Grep/Glob**: Project structure analysis and content extraction for documentation generation
+- **Write**: Documentation creation with intelligent organization and cross-referencing
+- **TodoWrite**: Progress tracking for complex multi-component documentation workflows
+- **Task**: Advanced delegation for large-scale documentation requiring systematic coordination
+
+## Key Patterns
+- **Structure Analysis**: Project examination → component identification → logical organization → cross-referencing
+- **Documentation Types**: API docs → Structure docs → README → Knowledge base approaches
+- **Quality Validation**: Completeness assessment → accuracy verification → standard compliance → maintenance planning
+- **Framework Integration**: Context7 patterns → official standards → best practices → consistency validation
+
+## Examples
+
+### Project Structure Documentation
+```
+/sc:index project-root --type structure --format md
+# Comprehensive project structure documentation with intelligent organization
+# Creates navigable structure with cross-references and component relationships
+```
+
+### API Documentation Generation
+```
+/sc:index src/api --type api --format json
+# API documentation with systematic analysis and validation
+# Scribe and quality personas ensure completeness and accuracy
+```
+
+### Knowledge Base Creation
+```
+/sc:index . --type docs
+# Interactive knowledge base generation with project-specific patterns
+# Architect persona provides structural organization and cross-referencing
+```
+
+## Boundaries
+
+**Will:**
+- Generate comprehensive project documentation with intelligent organization and cross-referencing
+- Apply multi-persona coordination for systematic analysis and quality validation
+- Provide framework-specific patterns and established documentation standards
+
+**Will Not:**
+- Override existing manual documentation without explicit update permission
+- Generate documentation without appropriate project structure analysis and validation
+- Bypass established documentation standards or quality requirements