Add Congregate into GitLab
Overview
The Professional Services team has built a project, https://gitlab.com/gitlab-com/customer-success/tools/congregate, as a GitLab migration tool.
Proposal
- Bundle this tool into GitLab as a dedicated GitLab importer that supports a variety of sources.
Should we link to this from documentation, maybe link to here from the bottom of https://about.gitlab.com/install/?