Create dotnet new template for NuGet library projects

[Keboo]

• Allow setting LangVersion (default to 9.0)
• Enable warnings as errors on all projects (consider Directory.Build.props)
• Add IntelliTect analyzer library (allow setting version in template)
• Add in unit test project (slight preference to xUnit)
• README.md
• Should have a single unit test that go against the library passes (Hello world level)
• Enable flag to create nuget package on every build.

The contents for the template should live in a new folder at the root of the repo named templates.
The folder for this template should be called IntelliTectClassLibrary

Name of the template: IntelliTect Class Library
Short Name: itl-classlib
Tags: IntelliTect/Library

[adamskt]

Perhaps a Template Repo would be better suited for this?

[Keboo]

That is a good question. I think it really depends on if we want the starting point to be a new GitHub repo or from the dotnet CLI, as the end results after that point are pretty similar.