.NET SDK Support 1.3.1 API

Packages
Package
Description
This package contains the main components of the plugin.
The package contains build steps for the dotnet commands.
The package contains build steps for the dotnet commands that are based on MSBuild.
The package contains build steps for the subcommands of dotnet nuget.
The package contains build steps for the subcommands of dotnet tool.
This package contains classes that process the .NET command's output, adding markup or detecting errors/warnings.
This package contains classes for processing related data (runtime identifiers, SDK downloads, …).