Show recently used templates when executing 'dotnet new'

[vlada-shubina]

Now the list of templates to be shown when running dotnet new is fixed.
Add recently used templates in the list - last N templates used by the user.

Technical details: we may preserve the date time when the template was run last time in template cache. It requires cache format modification.
Using this information we can determine last N templates (template groups) used by user and show them in curated list instead.