Add Node.js implementation with enhanced search capabilities

- Implement complete Express.js server with SQLite FTS5 search
- Add modern responsive UI with dark/light themes
- Enhance search with partial word matching and advanced filters
- Add RESTful API with comprehensive endpoints
- Include security features (Helmet.js, rate limiting, CORS)
- Add performance optimizations (gzip, caching, WAL mode)
- Provide comprehensive documentation and setup scripts
- Maintain feature parity with Python implementation while adding enhancements

src/init-db.js

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+const fs = require('fs-extra');
+const path = require('path');
+const WorkflowDatabase = require('./database');
+
+async function initializeDatabase() {
+  console.log('🔄 Initializing N8N Workflow Database...');
+  
+  try {
+    // Ensure required directories exist
+    await fs.ensureDir('database');
+    await fs.ensureDir('workflows');
+    await fs.ensureDir('static');
+    
+    console.log('✅ Directories created/verified');
+    
+    // Initialize database
+    const db = new WorkflowDatabase();
+    await db.initialize();
+    
+    // Get stats to verify database works
+    const stats = await db.getStats();
+    console.log('✅ Database initialized successfully');
+    console.log(`📊 Current stats: ${stats.total} workflows`);
+    
+    db.close();
+    
+    console.log('\n🎉 Initialization complete!');
+    console.log('Next steps:');
+    console.log('1. Place your workflow JSON files in the "workflows" directory');
+    console.log('2. Run "npm run index" to index your workflows');
+    console.log('3. Run "npm start" to start the server');
+    
+  } catch (error) {
+    console.error('❌ Initialization failed:', error.message);
+    process.exit(1);
+  }
+}
+
+if (require.main === module) {
+  initializeDatabase();
+}
+
+module.exports = { initializeDatabase };