Description

Setup the project to use XUnit

Requirement Description

Restructure your current project so that the Chirp! application and the CSV database library reside under a src/ directory Hint: use git mv to move files and directories while restructuring.
Create XUnit .NET test projects, see dotnet new list in a test directory that is in the root of your project, see e.g., page 880 of A. Lock ASP.NET Core in Action, Third Edition. That is, one test project that tests your Chirp! CLI app and a second one that tests your CSV database library project.
Make your test projects depend on the respective system under test (SUT). That is, add a reference from each of the two test projects to either the Chirp! CLI app or to the CSV database library project with the dotnet add reference command.
Acceptence criteria
[x] Add XUnit to the project
[x] Refactor the project to use test libaries