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/git.md

@@ -0,0 +1,80 @@
+---
+name: git
+description: "Git operations with intelligent commit messages and workflow optimization"
+category: utility
+complexity: basic
+mcp-servers: []
+personas: []
+---
+
+# /sc:git - Git Operations
+
+## Triggers
+- Git repository operations: status, add, commit, push, pull, branch
+- Need for intelligent commit message generation
+- Repository workflow optimization requests
+- Branch management and merge operations
+
+## Usage
+```
+/sc:git [operation] [args] [--smart-commit] [--interactive]
+```
+
+## Behavioral Flow
+1. **Analyze**: Check repository state and working directory changes
+2. **Validate**: Ensure operation is appropriate for current Git context
+3. **Execute**: Run Git command with intelligent automation
+4. **Optimize**: Apply smart commit messages and workflow patterns
+5. **Report**: Provide status and next steps guidance
+
+Key behaviors:
+- Generate conventional commit messages based on change analysis
+- Apply consistent branch naming conventions
+- Handle merge conflicts with guided resolution
+- Provide clear status summaries and workflow recommendations
+
+## Tool Coordination
+- **Bash**: Git command execution and repository operations
+- **Read**: Repository state analysis and configuration review
+- **Grep**: Log parsing and status analysis
+- **Write**: Commit message generation and documentation
+
+## Key Patterns
+- **Smart Commits**: Analyze changes → generate conventional commit message
+- **Status Analysis**: Repository state → actionable recommendations
+- **Branch Strategy**: Consistent naming and workflow enforcement
+- **Error Recovery**: Conflict resolution and state restoration guidance
+
+## Examples
+
+### Smart Status Analysis
+```
+/sc:git status
+# Analyzes repository state with change summary
+# Provides next steps and workflow recommendations
+```
+
+### Intelligent Commit
+```
+/sc:git commit --smart-commit
+# Generates conventional commit message from change analysis
+# Applies best practices and consistent formatting
+```
+
+### Interactive Operations
+```
+/sc:git merge feature-branch --interactive
+# Guided merge with conflict resolution assistance
+```
+
+## Boundaries
+
+**Will:**
+- Execute Git operations with intelligent automation
+- Generate conventional commit messages from change analysis
+- Provide workflow optimization and best practice guidance
+
+**Will Not:**
+- Modify repository configuration without explicit authorization
+- Execute destructive operations without confirmation
+- Handle complex merges requiring manual intervention