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

test/Spectre.Console.Cli.Tests/Expectations/Help/DefaultExamples.Output.verified.txt

@@ -0,0 +1,16 @@
+USAGE:
+    myapp <TEETH> [LEGS] [OPTIONS]
+
+EXAMPLES:
+    myapp 12 -c 3
+
+ARGUMENTS:
+    <TEETH>    The number of teeth the lion has
+    [LEGS]     The number of legs
+
+OPTIONS:
+    -h, --help               Prints help information
+    -a, --alive              Indicates whether or not the animal is alive
+    -n, --name <VALUE>
+        --agility <VALUE>    The agility between 0 and 100
+    -c <CHILDREN>            The number of children the lion has