docs: Add comprehensive MCP Tools configuration sections to both READMEs

## Documentation Enhancements
- **MCP Configuration Sections**: Added dedicated "MCP Tools Configuration" sections in both English and Chinese READMEs
- **Installation Guidance**: Clear step-by-step MCP server installation guides with direct repository links
- **Configuration Resources**: Comprehensive table with installation guides and purposes for each MCP server
- **Benefits Overview**: Detailed explanation of enhanced capabilities when MCP tools are enabled

## User Experience Improvements
- **Optional Enhancement Badging**: Blue "Optional" badges to indicate MCP tools are not required
- **Clear Navigation**: Direct links to GitHub repositories for easy access
- **Pro Tips**: Professional guidance on gradual adoption approach
- **Visual Structure**: Well-organized sections with emojis and clear headings

## Configuration Details
### English README.md
- Added "MCP Tools Configuration (Optional Enhancement)" section
- Quick MCP Setup with two installation options
- Benefits breakdown with specific capability improvements
- Configuration resources table with direct links

### Chinese README_CN.md
- Added "MCP 工具配置 (可选增强)" section
- Translated installation guides and benefits
- Localized professional tips and guidance
- Consistent structure with English version

## Technical Integration
- **Automatic Detection**: CCW automatically detects and uses available MCP tools
- **Fallback Strategy**: Traditional tools used when MCP unavailable
- **IDE Integration**: Simple restart-based activation process
- **No Breaking Changes**: Completely optional enhancement to existing functionality

🔧 Enhanced user onboarding and configuration guidance for MCP tools integration

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

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

README.md

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+### 🔧 **MCP Tools Configuration** *(Optional Enhancement)*
+
+[![MCP Tools](https://img.shields.io/badge/🔧_MCP_Tools-Optional-blue.svg)](https://github.com/modelcontextprotocol)
+
+**MCP (Model Context Protocol) tools provide enhanced codebase analysis capabilities. They are completely optional - CCW works perfectly without them.**
+
+#### **Quick MCP Setup**
+1. **Install MCP Servers** (choose what you need):
+   ```bash
+   # Option 1: Exa MCP Server (External API patterns)
+   # 📋 Installation Guide: https://github.com/exa-labs/exa-mcp-server
+
+   # Option 2: Code Index MCP (Advanced code search)
+   # 📋 Installation Guide: https://github.com/johnhuang316/code-index-mcp
+   ```
+
+2. **Configure Claude Code IDE**:
+   - Follow the MCP server installation guides above
+   - Restart Claude Code IDE after MCP server installation
+   - CCW will automatically detect and use available MCP tools
+
+#### **Benefits When Enabled**
+- 📊 **Faster Analysis**: Direct codebase indexing vs manual searching
+- 🌐 **External Context**: Real-world API patterns and examples
+- 🔍 **Advanced Search**: Pattern matching and similarity detection
+- ⚡ **Automatic Fallback**: Uses traditional tools when MCP unavailable
+
+#### **Configuration Resources**
+| MCP Server | Installation Guide | Purpose |
+|------------|-------------------|---------|
+| 🌐 **Exa MCP** | [Installation Guide](https://github.com/exa-labs/exa-mcp-server) | External API patterns & best practices |
+| 🔍 **Code Index MCP** | [Installation Guide](https://github.com/johnhuang316/code-index-mcp) | Advanced internal codebase search |
+| 📖 **MCP Protocol** | [Official Documentation](https://github.com/modelcontextprotocol) | Technical specifications |
+
+> **💡 Pro Tip**: Start with basic CCW functionality, then add MCP tools when you want enhanced analysis capabilities.
+
 ---
 
 ## 🤝 Contributing