FOSSA extension

Created by: sqs

@xizhao is interested in FOSSA building a license and security extension that would show, for any repo/dir/file, a list of license- and security-related warnings. These would be for the entire repo/dir/file (not per-line). The content would be something like a list of links to CVEs and a link to more info about them on FOSSA. It should work for public and private code and with public and self-hosted FOSSA instances.

@xizhao see https://about.sourcegraph.com/blog/extension-authoring for instructions and examples. It’s in alpha but we are 100% committed to it and will address anything you run into. @ryan-blunden can chime in.