feat: Complete overhaul to enhanced documentation-only MCP server

- Removed all workflow execution capabilities per user requirements
- Implemented enhanced documentation extraction with operations and API mappings
- Fixed credential code extraction for all nodes
- Fixed package info extraction (name and version)
- Enhanced operations parser to handle n8n markdown format
- Fixed documentation search to prioritize app nodes over trigger nodes
- Comprehensive test coverage for Slack node extraction
- All node information now includes:
  - Complete operations list (42 for Slack)
  - API method mappings with documentation URLs
  - Source code and credential definitions
  - Package metadata
  - Related resources and templates

🤖 Generated with Claude Code

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

tests/debug-slack-doc.js

@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+const { execSync } = require('child_process');
+const path = require('path');
+
+const tempDir = path.join(process.cwd(), 'temp', 'n8n-docs');
+
+console.log('🔍 Debugging Slack documentation search...\n');
+
+// Search for all Slack related files
+console.log('All Slack-related markdown files:');
+try {
+  const allSlackFiles = execSync(
+    `find ${tempDir}/docs/integrations/builtin -name "*slack*.md" -type f`,
+    { encoding: 'utf-8' }
+  ).trim().split('\n');
+  
+  allSlackFiles.forEach(file => {
+    console.log(`  - ${file}`);
+  });
+} catch (error) {
+  console.log('  No files found');
+}
+
+console.log('\n📄 Checking file paths:');
+const possiblePaths = [
+  'docs/integrations/builtin/app-nodes/n8n-nodes-base.Slack.md',
+  'docs/integrations/builtin/app-nodes/n8n-nodes-base.slack.md',
+  'docs/integrations/builtin/core-nodes/n8n-nodes-base.Slack.md',
+  'docs/integrations/builtin/core-nodes/n8n-nodes-base.slack.md',
+  'docs/integrations/builtin/trigger-nodes/n8n-nodes-base.Slack.md',
+  'docs/integrations/builtin/trigger-nodes/n8n-nodes-base.slack.md',
+  'docs/integrations/builtin/credentials/slack.md',
+];
+
+const fs = require('fs');
+possiblePaths.forEach(p => {
+  const fullPath = path.join(tempDir, p);
+  const exists = fs.existsSync(fullPath);
+  console.log(`  ${exists ? '✓' : '✗'} ${p}`);
+  
+  if (exists) {
+    // Read first few lines
+    const content = fs.readFileSync(fullPath, 'utf-8');
+    const lines = content.split('\n').slice(0, 10);
+    const title = lines.find(l => l.includes('title:'));
+    if (title) {
+      console.log(`    Title: ${title.trim()}`);
+    }
+  }
+});