CLI Lessons Updated to Spectre.Console v0.36

With the changes to merge the Spectre.Cli and Spectre.Console packages, we had to update our existing lessons to the new combined package as well. Starting with Spectre.Console v0.36, both code bases are in a single package. Our tutorial lessons have also been updated to the new version.

• Lesson 1.1: Starting with Spectre.Console.Cli
• Lesson 1.2: Multiple, Default, and Hidden Commands

There were only minor changes required to the sample code, so it should be easy to follow along:

• The Spectre.Cli package was removed from the projects.
• The Spectre.Console package was added to the projects.
• And, the Spectre.Cli namespace in the source files was changed to Spectre.Console.Cli.