Add AI NLP and router modules for advanced natural language processing

- Introduced comprehensive NLP processing modules for intent classification, entity extraction, and context analysis
- Created AI router with rate-limited endpoints for command interpretation and execution
- Added prompt templates for different AI models with configurable system and user prompts
- Implemented robust type definitions for AI-related interfaces and schemas
- Enhanced security and error handling in AI processing pipeline

__tests__/security/index.test.ts

@@ -1,4 +1,4 @@
-import { TokenManager, validateRequest, sanitizeInput, errorHandler } from '../../src/security';
+import { TokenManager, validateRequest, sanitizeInput, errorHandler } from '../../src/security/index.js';
 import { Request, Response } from 'express';
 
 describe('Security Module', () => {