Find unused assets

This is a tool for finding unused assets in your code base.
The options are similar to bin/findOneInclude with an additional 'limitsearch' option, to limit the search to a specific directory in the root of the project (for example to exclude a directory that contains 3rd party libraries).
I think this populate query needs to be a lot bigger. I have had a lot of success with using `{ followRelations: { hrefType: ['relative', 'rootRelative'] } }` to just get everything local. That will probably get you most of the way