feat: add storage foundation and i18n resources

YKanBan.Tests/Launching/LaunchArgumentsTests.cs

@@ -0,0 +1,40 @@
+using YKanBan.Launching;
+
+namespace YKanBan.Tests.Launching;
+
+/// <summary>
+/// Tests for the <c>ykanban &lt;path&gt;</c> command-line contract across its
+/// three branches: no argument, one valid path, and invalid input.
+/// </summary>
+[TestClass]
+public class LaunchArgumentsTests
+{
+    [TestMethod]
+    public void NoArgumentsIsRejected()
+    {
+        Assert.IsFalse(LaunchArguments.TryParse([], out string? path));
+        Assert.IsNull(path);
+    }
+
+    [TestMethod]
+    public void BlankArgumentIsRejected()
+    {
+        Assert.IsFalse(LaunchArguments.TryParse(["   "], out string? path));
+        Assert.IsNull(path);
+    }
+
+    [TestMethod]
+    public void MoreThanOneArgumentIsRejected()
+    {
+        Assert.IsFalse(LaunchArguments.TryParse(["a", "b"], out string? path));
+        Assert.IsNull(path);
+    }
+
+    [TestMethod]
+    public void SinglePathIsAccepted()
+    {
+        bool parsed = LaunchArguments.TryParse([@"C:\Repo\MyProject"], out string? path);
+        Assert.IsTrue(parsed);
+        Assert.AreEqual(@"C:\Repo\MyProject", path);
+    }
+}