docs: update version to v3.0.0 and release notes

Changes:
- Update version badge from v2.1.0-experimental to v3.0.0
- Replace MCP tools release notes with v3.0.0 unified CLI structure
- Highlight breaking changes: deprecated tool-specific commands
- Add reference to migration guide for users upgrading from v2.x

English README:
- Latest Release v3.0.0: unified CLI command structure
- Breaking Changes: /gemini:*, /qwen:*, /codex:* deprecated

Chinese README:
- 最新版本 v3.0.0: 统一 CLI 命令结构
- 破坏性变更: 旧的工具特定命令已弃用

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

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

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[![Version](https://img.shields.io/badge/version-v2.1.0--experimental-blue.svg)](https://github.com/catlog22/Claude-Code-Workflow/releases)
+[![Version](https://img.shields.io/badge/version-v3.0.0-blue.svg)](https://github.com/catlog22/Claude-Code-Workflow/releases)
 [![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey.svg)]()
 [![MCP Tools](https://img.shields.io/badge/🔧_MCP_Tools-Experimental-orange.svg)](https://github.com/modelcontextprotocol)
@@ -17,9 +17,9 @@
 
 **Claude Code Workflow (CCW)** is a next-generation multi-agent automation framework for software development that orchestrates complex development tasks through intelligent workflow management and autonomous execution.
 
-> **🧪 Latest Release v2.1.0-experimental**: Introduces **experimental MCP (Model Context Protocol) tools integration** for enhanced codebase analysis and external context retrieval. Includes Exa MCP Server for external API patterns and Code Index MCP for advanced internal codebase exploration. See [CHANGELOG.md](CHANGELOG.md) for details.
+> **🎉 Latest Release v3.0.0**: Major update with **unified CLI command structure**. Consolidates Gemini, Qwen, and Codex commands into a single `/cli:*` command set with `--tool` flag for tool selection. Includes comprehensive workflow guide and command verification. See [CHANGELOG.md](CHANGELOG.md) for details.
 
-> **⚠️ Experimental Features**: MCP tools are optional and experimental. All existing functionality remains stable.
+> **⚠️ Breaking Changes**: Previous tool-specific commands (`/gemini:*`, `/qwen:*`, `/codex:*`) are deprecated. Use new unified `/cli:*` commands instead. See migration guide below.
 
 ### 🌟 Key Innovations