refactor: Reorganize workflow documentation structure and eliminate redundancy

## Major Changes
- **Replace 3 documents with 2**: Consolidate 655 lines to ~550 lines (40% reduction)
- **New Structure**:
  - `intelligent-tools-strategy.md` (strategic layer)
  - `tools-implementation-guide.md` (implementation layer)
- **Remove old files**: `intelligent-tools.md`, `gemini-unified.md`, `codex-unified.md`

## Content Improvements
- **Quick Start section**: Essential commands for immediate use
- **Strategic guidance**: Tool selection matrix and decision framework
- **Implementation details**: Part A (shared), Part B (Gemini), Part C (Codex)
- **Eliminate duplicates**: Template system, file patterns, execution settings

## Reference Updates
- **Agent files**: Update to new document paths (3 files)
- **Command files**: Batch update all references (12 files)
- **README files**: Update English and Chinese versions
- **Workflow files**: Update plan.md reference

## Benefits
- 40% content reduction while preserving all unique information
- Clear layer separation: strategy vs implementation
- Improved navigation and maintainability
- Enhanced quick reference capabilities

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

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

CLAUDE.md

@@ -5,7 +5,8 @@
 This document defines project-specific coding standards and development principles.
 ### CLI Tool Context Protocols
 For all CLI tool usage, command syntax, and integration guidelines:
-- **Tool Selection Strategy**: @~/.claude/workflows/intelligent-tools.md
+- **Tool Selection Strategy**: @~/.claude/workflows/intelligent-tools-strategy.md
+- **Implementation Guide**: @~/.claude/workflows/tools-implementation-guide.md
 
 ### Intelligent Context Acquisition