Run a tutorial which is contained within an R package.
available_tutorials(package = NULL)
Name of package
available_tutorials
will return a data.frame
containing "package", "name", and "title".
Note that when running a tutorial Rmd file with run_tutorial
the tutorial Rmd should have already been rendered as part of the
development of the package (i.e. the corresponding tutorial .html file for
the .Rmd file must exist).