Consider how to allow civictech community to more easily add orgs

[patcon]

Perhaps we could use github's topic feature, and choose a new topic that wouldn't infringe on anyone else's namespace.

We could then make the assumption that when a repo is tagged with this, then the parent org is a civictech-related org. So if someone wanted on the list, they'd just add topic flags to a couple repos, and they'd get into the next week's (?) generation of the graph