Mock sample: Shopify API

[waldekmastykarz]

Description

Create a mock sample for the Shopify Admin and Storefront APIs.

Why

• Widely used e-commerce platform with large app ecosystem
• Theme and app developers need realistic test data
• Product/order/customer data mocking accelerates development
• GraphQL and REST API patterns

Suggested endpoints to mock

• Products (CRUD operations)
• Orders and fulfillments
• Customers
• Inventory management
• Webhooks (order created, fulfilled, etc.)
• Storefront API (product queries, cart operations)