Handling singular and plural forms in `dotnet new` CLI

[vlada-shubina]

trafficstars

Currently using of singular and plural forms across dotnet new CLI:

• sometimes singular form is used for items that may be in plural
• sometimes plural form is used when there is only one item available
• sometimes singular-plural form is used, e.g. template package(s)

Make the usage of language consistent. The different statements should be used for singular / plural form where needed.

[sayedihashimi]

You could probably use https://www.nuget.org/packages/Humanizer/ to simplify some of this work.

[vlada-shubina]

This is SDK CLI wide problem, and likely should be addressed as the whole.