Implement order listing page

[priyankamastek]

1. Create a new UI page to list the orders that are created
2. The order listing page should have a table to display all the orders
3. The table should list the columns for Order Number, Customer Number, Item Count, Total, and Order Status
4. The item count needs to be computed dynamically based on the number of items in the order
5. When the page is loaded, the list of orders needs to be fetched from the API
6. Provide a button on top of the table to refresh the order list. Clicking on the button should fetch the latest list of orders from the API
7. Add unit tests and update documentation as appropriate