Vercel ai gateway (#10)

* feat: use vercel ai gateway

* fix: correct response handling

* ci: add pipeline

utils/purchases/store.ts

@@ -1,6 +1,6 @@
 import { PurchaseList, purchaseListSchema } from './types';
 import { Tool } from './tool';
-import { BaseTool, makeRequest } from '@anthropic';
+import { BaseTool, makeRequest } from '@utils/aiGatewayClient';
 import { generatePrompt } from './prompt';
 import { Consumer } from '@consumer/types';