Add Spectre.Cli to Spectre.Console

* Renames Spectre.Cli to Spectre.Console.Cli.
* Now uses Verify with Spectre.Console.Cli tests.
* Removes some duplicate definitions.

Closes #168

src/Spectre.Console.Tests/Data/Commands/AnimalCommand.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Linq;
+using Spectre.Console.Cli;
+using SystemConsole = System.Console;
+
+namespace Spectre.Console.Tests.Data
+{
+    public abstract class AnimalCommand<TSettings> : Command<TSettings>
+        where TSettings : CommandSettings
+    {
+        protected void DumpSettings(CommandContext context, TSettings settings)
+        {
+            if (context == null)
+            {
+                throw new ArgumentNullException(nameof(context));
+            }
+
+            if (settings == null)
+            {
+                throw new ArgumentNullException(nameof(settings));
+            }
+
+            var properties = settings.GetType().GetProperties();
+            foreach (var group in properties.GroupBy(x => x.DeclaringType).Reverse())
+            {
+                SystemConsole.WriteLine();
+                SystemConsole.ForegroundColor = ConsoleColor.Yellow;
+                SystemConsole.WriteLine(group.Key.FullName);
+                SystemConsole.ResetColor();
+
+                foreach (var property in group)
+                {
+                    SystemConsole.WriteLine($"  {property.Name} = {property.GetValue(settings)}");
+                }
+            }
+
+            if (context.Remaining.Raw.Count > 0)
+            {
+                SystemConsole.WriteLine();
+                SystemConsole.ForegroundColor = ConsoleColor.Yellow;
+                SystemConsole.WriteLine("Remaining:");
+                SystemConsole.ResetColor();
+                SystemConsole.WriteLine(string.Join(", ", context.Remaining));
+            }
+
+            SystemConsole.WriteLine();
+        }
+    }
+}