Chascin, Ryans Implementation

[MidnightNinja83]

Created a solution to get the exchange rates.

• I utilize the onion architecture pattern to ensure clean architecture and allow easy access to both the console and web versions of the app.
• Unit tests are omitted from this version due mostly to the simplicity of the action.
• I utilized a memory cache to reduce the calls required to the API endpoint.
• The API endpoint could have used a more simplified return type, but remained as it was to allow for further discusson of transformation patterns, and the impacts on what feature requests might come to change the shape of an API endpoint
• Logging was omitted at this time for the same reason.
• Observability was omitted