chore: reorganize project and add test project

YKanBan.Tests/ProjectReferenceTests.cs

@@ -0,0 +1,21 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace YKanBan.Tests;
+
+/// <summary>
+/// Smoke tests verifying that the test project is correctly wired to the
+/// application project and that the test runner can discover and execute tests.
+/// </summary>
+[TestClass]
+public class ProjectReferenceTests
+{
+    /// <summary>
+    /// Verifies that a type defined in the application assembly can be
+    /// referenced from the test project.
+    /// </summary>
+    [TestMethod]
+    public void ApplicationAssemblyIsReferenceable()
+    {
+        Assert.IsNotNull(typeof(App));
+    }
+}