Introduce CODEOWNERS

[awgreene]

Learn more about CODEOWNERS here, or look at this description below:

Code owners are automatically requested for review when someone opens a pull request that modifies code that they own. Code owners are not automatically requested to review draft pull requests. For more information about draft pull requests, see "About pull requests." When you mark a draft pull request as ready for review, code owners are automatically notified. If you convert a pull request to a draft, people who are already subscribed to notifications are not automatically unsubscribed. For more information, see "Changing the stage of a pull request."

When someone with admin or owner permissions has enabled required reviews, they also can optionally require approval from a code owner before the author can merge a pull request in the repository. For more information, see "About protected branches."

[dtfranz]

I noticed the description of the operator-framework/operator-controller-maintainers group is "non Red Hat operator-controller-maintainers" yet it's currently populated only with Red Hat people. That isn't the case for the other projects though e.g. deppy+rukpak's equivalent groups are non Red Hat only. Any reason it's set up that way?

[tmshort]

I agree with @dtfranz that the current list seems somewhat limiting.

[tmshort]

Is there any reason not to approve this? Or do we want to update the list of OWNERS first?

[tmshort]

Bueller?

[perdasilva]

lgtm