Implement Orders view screen

この issue には説明がありません。

The issue title indicates a new screen for viewing orders, but the description is empty. A newcomer would need to understand the existing frontend structure, likely in the src/views or src/pages directory, and the data models for orders. They should look for similar view screens (e.g., for products or users) to understand the pattern, and check if there's an API endpoint for fetching orders. 'Done' means a fully functional React component that displays order data, but without any guidance on design, data source, or required features, this is a design-heavy task.

索引モデルが issue の本文から書いたものです。