Improve terminal output to explain to the user exactly what was created

[umaar]

Here is a happy path:

dojo create theme
? What Package to do you want to theme? @dojo/widgets
? Any more? No
? Which of the @dojo/widgets theme files would you like to scaffold? accordionPane
 create ...src/themes/theme.ts

Notice, we are told a theme file was created, but not which CSS modules were created. The user should be told this information.