Proposal: define a workflow for managing community repositories

[stevendborrelli]

The growth of the Crossplane community is leading to the development of many new providers. We should codify the process of requesting and creating repositories in the crossplane-contrib Github organization. Repositories in crossplane-contrib could also include CI and Registry support.

For example, we could have a New Repository Issue template that includes a checklist required files for (License, DCO, Code of Conduct), and a list of owners. There is a PR to create a list of these items at crossplane/crossplane#2744.

Between crossplane/org workflows and provider-template we could cover almost all of the list.