The [`-d`,`--dotnet-path`] should be used for all calls out to `dotnet`

When parsing the command line parameters, it is possible that the [`-tfm`,`--target-framework`] option will be validated before the [`-d`,`--dotnet-path`] is. In this case the path to the dotnet SDK is not initialized so it will use the system default. The commands should ensure that the dotnet path is configured before any calls using `dotnet` are made.

Related to #132