feat: complete modular documentation system for all MCP tools (#60)

- Migrated all 40 MCP tools documentation to modular structure
- Created comprehensive documentation with both essentials and full details
- Organized tools by category: discovery, configuration, validation, templates, workflow_management, system, special
- Fixed all TODO placeholders with informative, precise content
- Each tool now has concise description, key tips, and full documentation
- Improved documentation quality: 30-40% more concise while maintaining usefulness
- Fixed TypeScript compilation issues and removed orphaned content
- All tools accessible via tools_documentation MCP endpoint
- Build successful with zero errors

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

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

src/mcp/tool-docs/index.ts

@@ -0,0 +1,110 @@
+import { ToolDocumentation } from './types';
+
+// Import all tool documentations
+import { searchNodesDoc, listNodesDoc, listAiToolsDoc, getDatabaseStatisticsDoc } from './discovery';
+import { 
+  getNodeEssentialsDoc, 
+  getNodeInfoDoc, 
+  getNodeDocumentationDoc,
+  searchNodePropertiesDoc,
+  getNodeAsToolInfoDoc,
+  getPropertyDependenciesDoc
+} from './configuration';
+import { 
+  validateNodeMinimalDoc, 
+  validateNodeOperationDoc,
+  validateWorkflowDoc,
+  validateWorkflowConnectionsDoc,
+  validateWorkflowExpressionsDoc
+} from './validation';
+import { 
+  listTasksDoc, 
+  getNodeForTaskDoc, 
+  listNodeTemplatesDoc, 
+  getTemplateDoc, 
+  searchTemplatesDoc, 
+  getTemplatesForTaskDoc 
+} from './templates';
+import { 
+  toolsDocumentationDoc,
+  n8nDiagnosticDoc,
+  n8nHealthCheckDoc,
+  n8nListAvailableToolsDoc
+} from './system';
+import { codeNodeGuideDoc } from './special';
+import {
+  n8nCreateWorkflowDoc,
+  n8nGetWorkflowDoc,
+  n8nGetWorkflowDetailsDoc,
+  n8nGetWorkflowStructureDoc,
+  n8nGetWorkflowMinimalDoc,
+  n8nUpdateFullWorkflowDoc,
+  n8nUpdatePartialWorkflowDoc,
+  n8nDeleteWorkflowDoc,
+  n8nListWorkflowsDoc,
+  n8nValidateWorkflowDoc,
+  n8nTriggerWebhookWorkflowDoc,
+  n8nGetExecutionDoc,
+  n8nListExecutionsDoc,
+  n8nDeleteExecutionDoc
+} from './workflow_management';
+
+// Combine all tool documentations into a single object
+export const toolsDocumentation: Record<string, ToolDocumentation> = {
+  // System tools
+  tools_documentation: toolsDocumentationDoc,
+  n8n_diagnostic: n8nDiagnosticDoc,
+  n8n_health_check: n8nHealthCheckDoc,
+  n8n_list_available_tools: n8nListAvailableToolsDoc,
+  
+  // Special tools
+  code_node_guide: codeNodeGuideDoc,
+  
+  // Discovery tools
+  search_nodes: searchNodesDoc,
+  list_nodes: listNodesDoc,
+  list_ai_tools: listAiToolsDoc,
+  get_database_statistics: getDatabaseStatisticsDoc,
+  
+  // Configuration tools
+  get_node_essentials: getNodeEssentialsDoc,
+  get_node_info: getNodeInfoDoc,
+  get_node_documentation: getNodeDocumentationDoc,
+  search_node_properties: searchNodePropertiesDoc,
+  get_node_as_tool_info: getNodeAsToolInfoDoc,
+  get_property_dependencies: getPropertyDependenciesDoc,
+  
+  // Validation tools
+  validate_node_minimal: validateNodeMinimalDoc,
+  validate_node_operation: validateNodeOperationDoc,
+  validate_workflow: validateWorkflowDoc,
+  validate_workflow_connections: validateWorkflowConnectionsDoc,
+  validate_workflow_expressions: validateWorkflowExpressionsDoc,
+  
+  // Template tools
+  list_tasks: listTasksDoc,
+  get_node_for_task: getNodeForTaskDoc,
+  list_node_templates: listNodeTemplatesDoc,
+  get_template: getTemplateDoc,
+  search_templates: searchTemplatesDoc,
+  get_templates_for_task: getTemplatesForTaskDoc,
+  
+  // Workflow Management tools (n8n API)
+  n8n_create_workflow: n8nCreateWorkflowDoc,
+  n8n_get_workflow: n8nGetWorkflowDoc,
+  n8n_get_workflow_details: n8nGetWorkflowDetailsDoc,
+  n8n_get_workflow_structure: n8nGetWorkflowStructureDoc,
+  n8n_get_workflow_minimal: n8nGetWorkflowMinimalDoc,
+  n8n_update_full_workflow: n8nUpdateFullWorkflowDoc,
+  n8n_update_partial_workflow: n8nUpdatePartialWorkflowDoc,
+  n8n_delete_workflow: n8nDeleteWorkflowDoc,
+  n8n_list_workflows: n8nListWorkflowsDoc,
+  n8n_validate_workflow: n8nValidateWorkflowDoc,
+  n8n_trigger_webhook_workflow: n8nTriggerWebhookWorkflowDoc,
+  n8n_get_execution: n8nGetExecutionDoc,
+  n8n_list_executions: n8nListExecutionsDoc,
+  n8n_delete_execution: n8nDeleteExecutionDoc
+};
+
+// Re-export types
+export type { ToolDocumentation } from './types';