Show CLI commands to add package ref

[phrohdoh]

For example https://www.fuget.org/packages/Newtonsoft.Json shows the following which can be added to the *proj file:

<PackageReference Include="Newtonsoft.Json" Version="11.0.2" />

It'd be useful to show the dotnet, package-manager (powershell), and paket syntax to add the package reference, too.

See https://www.nuget.org/packages/Newtonsoft.Json/ to see how nuget.org does it.

[praeclarum]

Yes!