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/agents/code-developer.md

@@ -58,7 +58,7 @@ ELIF context insufficient OR task has analysis marker:
 **Analysis CLI Usage Standards**:
 - **Gemini CLI**: Use task-specific paths from JSON: `bash(~/.claude/scripts/gemini-wrapper -p "$(~/.claude/scripts/read-task-paths.sh [task-json-file]) [prompt]")`
 - **Codex CLI**: Use task-specific paths from JSON: `bash(codex --full-auto exec "$(~/.claude/scripts/read-task-paths.sh [task-json-file]) [prompt]")`
-- **Follow Guidelines**: @~/.claude/workflows/gemini-unified.md and @~/.claude/workflows/codex-unified.md
+- **Follow Guidelines**: @~/.claude/workflows/intelligent-tools-strategy.md and @~/.claude/workflows/tools-implementation-guide.md
 
 
 **Test-Driven Development**: