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

examples/Console/Rules/Program.cs

@@ -0,0 +1,43 @@
+using Spectre.Console;
+
+namespace EmojiExample
+{
+    public static class Program
+    {
+        public static void Main(string[] args)
+        {
+            // No title
+            Render(
+                new Rule()
+                    .RuleStyle(Style.Parse("yellow"))
+                    .AsciiBorder()
+                    .LeftAligned());
+
+            // Left aligned title
+            Render(
+                new Rule("[blue]Left aligned[/]")
+                    .RuleStyle(Style.Parse("red"))
+                    .DoubleBorder()
+                    .LeftAligned());
+
+            // Centered title
+            Render(
+                new Rule("[green]Centered[/]")
+                    .RuleStyle(Style.Parse("green"))
+                    .HeavyBorder()
+                    .Centered());
+
+            // Right aligned title
+            Render(
+                new Rule("[red]Right aligned[/]")
+                    .RuleStyle(Style.Parse("blue"))
+                    .RightAligned());
+        }
+
+        private static void Render(Rule rule)
+        {
+            AnsiConsole.Render(rule);
+            AnsiConsole.WriteLine();
+        }
+    }
+}

examples/Console/Rules/Rules.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+    <ExampleTitle>Rules</ExampleTitle>
+    <ExampleDescription>Demonstrates how to render horizontal rules (lines).</ExampleDescription>
+    <ExampleGroup>Widgets</ExampleGroup>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\src\Spectre.Console\Spectre.Console.csproj" />
+  </ItemGroup>
+
+</Project>