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/brainstorm.md

@@ -0,0 +1,100 @@
+---
+name: brainstorm
+description: "Interactive requirements discovery through Socratic dialogue and systematic exploration"
+category: orchestration
+complexity: advanced
+mcp-servers: [sequential, context7, magic, playwright, morphllm, serena]
+personas: [architect, analyzer, frontend, backend, security, devops, project-manager]
+---
+
+# /sc:brainstorm - Interactive Requirements Discovery
+
+> **Context Framework Note**: This file provides behavioral instructions for Claude Code when users type `/sc:brainstorm` patterns. This is NOT an executable command - it's a context trigger that activates the behavioral patterns defined below.
+
+## Triggers
+- Ambiguous project ideas requiring structured exploration
+- Requirements discovery and specification development needs
+- Concept validation and feasibility assessment requests
+- Cross-session brainstorming and iterative refinement scenarios
+
+## Context Trigger Pattern
+```
+/sc:brainstorm [topic/idea] [--strategy systematic|agile|enterprise] [--depth shallow|normal|deep] [--parallel]
+```
+**Usage**: Type this pattern in your Claude Code conversation to activate brainstorming behavioral mode with systematic exploration and multi-persona coordination.
+
+## Behavioral Flow
+1. **Explore**: Transform ambiguous ideas through Socratic dialogue and systematic questioning
+2. **Analyze**: Coordinate multiple personas for domain expertise and comprehensive analysis
+3. **Validate**: Apply feasibility assessment and requirement validation across domains
+4. **Specify**: Generate concrete specifications with cross-session persistence capabilities
+5. **Handoff**: Create actionable briefs ready for implementation or further development
+
+Key behaviors:
+- Multi-persona orchestration across architecture, analysis, frontend, backend, security domains
+- Advanced MCP coordination with intelligent routing for specialized analysis
+- Systematic execution with progressive dialogue enhancement and parallel exploration
+- Cross-session persistence with comprehensive requirements discovery documentation
+
+## MCP Integration
+- **Sequential MCP**: Complex multi-step reasoning for systematic exploration and validation
+- **Context7 MCP**: Framework-specific feasibility assessment and pattern analysis
+- **Magic MCP**: UI/UX feasibility and design system integration analysis
+- **Playwright MCP**: User experience validation and interaction pattern testing
+- **Morphllm MCP**: Large-scale content analysis and pattern-based transformation
+- **Serena MCP**: Cross-session persistence, memory management, and project context enhancement
+
+## Tool Coordination
+- **Read/Write/Edit**: Requirements documentation and specification generation
+- **TodoWrite**: Progress tracking for complex multi-phase exploration
+- **Task**: Advanced delegation for parallel exploration paths and multi-agent coordination
+- **WebSearch**: Market research, competitive analysis, and technology validation
+- **sequentialthinking**: Structured reasoning for complex requirements analysis
+
+## Key Patterns
+- **Socratic Dialogue**: Question-driven exploration → systematic requirements discovery
+- **Multi-Domain Analysis**: Cross-functional expertise → comprehensive feasibility assessment
+- **Progressive Coordination**: Systematic exploration → iterative refinement and validation
+- **Specification Generation**: Concrete requirements → actionable implementation briefs
+
+## Examples
+
+### Systematic Product Discovery
+```
+/sc:brainstorm "AI-powered project management tool" --strategy systematic --depth deep
+# Multi-persona analysis: architect (system design), analyzer (feasibility), project-manager (requirements)
+# Sequential MCP provides structured exploration framework
+```
+
+### Agile Feature Exploration
+```
+/sc:brainstorm "real-time collaboration features" --strategy agile --parallel
+# Parallel exploration paths with frontend, backend, and security personas
+# Context7 and Magic MCP for framework and UI pattern analysis
+```
+
+### Enterprise Solution Validation
+```
+/sc:brainstorm "enterprise data analytics platform" --strategy enterprise --validate
+# Comprehensive validation with security, devops, and architect personas
+# Serena MCP for cross-session persistence and enterprise requirements tracking
+```
+
+### Cross-Session Refinement
+```
+/sc:brainstorm "mobile app monetization strategy" --depth normal
+# Serena MCP manages cross-session context and iterative refinement
+# Progressive dialogue enhancement with memory-driven insights
+```
+
+## Boundaries
+
+**Will:**
+- Transform ambiguous ideas into concrete specifications through systematic exploration
+- Coordinate multiple personas and MCP servers for comprehensive analysis
+- Provide cross-session persistence and progressive dialogue enhancement
+
+**Will Not:**
+- Make implementation decisions without proper requirements discovery
+- Override user vision with prescriptive solutions during exploration phase
+- Bypass systematic exploration for complex multi-domain projects