hello, were wondering some suggested graphite based worfklows for the following scenario: we have a public/open-source repo with our latest features and a

main

branch. we have some work in progress features we don't want the public to know about, and we want to work on them in private, but be able to keep those private features up to date with what's public, eventually these would be merged into the public open source repo. any suggested paths for this?