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>

N8N_HTTP_STREAMABLE_SETUP.md

@@ -68,7 +68,7 @@ Add an MCP Client node to your workflow with these settings:
 
 ### List Tools
 Shows all available MCP tools:
-- `start_here_workflow_guide`
+- `tools_documentation`
 - `list_nodes`
 - `get_node_info`
 - `search_nodes`