feat(tools): rename start_here to tools_documentation with depth control (v2.7.4)

- Renamed start_here_workflow_guide to tools_documentation for clarity
- Added depth parameter to control documentation detail (essentials/full)
- Converted output from JSON to LLM-friendly plain text format
- Added per-tool documentation capability
- Created two-tier documentation system:
  - Essentials: brief info with key parameters and tips
  - Full: comprehensive docs with examples and best practices
- Documented 8 commonly used MCP tools
- Removed 380+ lines of unused getWorkflowGuide method
- Fixed duplicate tool definitions
- Updated all documentation references
- Added test script for tools documentation

BREAKING CHANGE: start_here_workflow_guide renamed to tools_documentation

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

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

docs/README_CLAUDE_SETUP.md

@@ -115,7 +115,7 @@ After restarting Claude Desktop:
 ## 🔧 Available Tools (v2.5.1)
 
 ### Essential Tool - Start Here!
-- **`start_here_workflow_guide`** - Essential guide and best practices (ALWAYS use this first!)
+- **`tools_documentation`** - Get documentation for any MCP tool (ALWAYS use this first!)
 
 ### Core Tools
 - **`list_nodes`** - List all n8n nodes with filtering options