Brand new SFDX projects contain a force-app directory tree containing empty folders
and a few .eslintrc.json files. We still want to consider such a directory tree
as 'empty' for the sake of operations like downloading package version metadata.
Parameters
directory: string
The absolute path to a directory
Returns boolean
true if the directory contains nothing except empty directories or
directories containing only an .eslintrc.json file.
Brand new SFDX projects contain a force-app directory tree containing empty folders and a few .eslintrc.json files. We still want to consider such a directory tree as 'empty' for the sake of operations like downloading package version metadata.