Feature: fetch today's and tomorrow's exchange price by calling API from Stormbreaker service

[AnhCaooo]

Background:

This feature will allow users to view the current exchange rates. Users will be able to see today's rate and the rate for tomorrow whenever it is available from external source. This information is crucial for users who are financially involved in electricity consumption or who simply want to stay informed about exchange price status.

Benefits:

• Improved User Experience: Users can conveniently access real-time exchange rates in the app.
• Increased Transparency: Users can be informed about exchange price based on up-to-date exchange rates.

Acceptance Criteria:

• The application must be able to fetch exchange rates for a specified currency pair using an API call from the Stormbreaker service.
• The exchange rates must be displayed in a user-friendly format within the application.
• The application should handle error scenarios gracefully, such as when the API call fails or the response data is invalid.
• The feature should be unit tested to ensure its functionality.

[AnhCaooo]

Let's learn how to call network requests in Swift and its best practices..