feat: add OpenAI provider integration and examples

src/index.ts

@@ -28,11 +28,13 @@ export { BaseAIProvider } from './providers/base.js';
 
 // Concrete provider implementations
 export { ClaudeProvider, type ClaudeConfig } from './providers/claude.js';
+export { OpenAIProvider, type OpenAIConfig } from './providers/openai.js';
 
 // Utility functions and factory
 export {
   createProvider,
   createClaudeProvider,
+  createOpenAIProvider,
   ProviderRegistry,
   type ProviderType,
   type ProviderConfigMap
@@ -49,4 +51,4 @@ export const VERSION = '1.0.0';
 /**
  * List of supported providers
  */
-export const SUPPORTED_PROVIDERS = ['claude'] as const; 
+export const SUPPORTED_PROVIDERS = ['claude', 'openai'] as const;