Adding better type names for return types and parameters

Uses the typenamehelper from Ben.Demystifer to help break down things like generic lists into their actual type display name.

test/Spectre.Console.Tests/Data/Exceptions.cs

@@ -29,4 +29,10 @@ public static class TestExceptions
             throw new InvalidOperationException("Something threw!", ex);
         }
     }
+
+    public static List<T> GenericMethodWithOutThatThrows<T>(out List<T> firstFewItems)
+    {
+        firstFewItems = new List<T>();
+        throw new InvalidOperationException("Throwing!");
+    }
 }