Move Spectre.Console.Cli to it's own package

test/Spectre.Console.Cli.Tests/Data/Settings/DogSettings.cs

@@ -0,0 +1,20 @@
+namespace Spectre.Console.Tests.Data;
+
+public sealed class DogSettings : MammalSettings
+{
+    [CommandArgument(0, "<AGE>")]
+    public int Age { get; set; }
+
+    [CommandOption("-g|--good-boy")]
+    public bool GoodBoy { get; set; }
+
+    public override ValidationResult Validate()
+    {
+        if (Name == "Tiger")
+        {
+            return ValidationResult.Error("Tiger is not a dog name!");
+        }
+
+        return ValidationResult.Success();
+    }
+}