Add support to create new projects from templates

[ilg-ul]

Create a separate Hello World project template and integrate it into the exception.

Add a Quick Start option to create a simple project (plain C, CMake, no questions asked), and a separate choice which will ask several questions (C/C++, CMake/meson, etc).

[ilg-ul]

Three commands were added

• create empty project
• quick start (C++, CMake)
• create configurable Hello World

[ilg-ul]

Fixed on 2021-04-21.