Upstream Patch Collaboration Workflow

User story

As an Upstream maintainer I want to submit, review and merge patches via Upstream.

We want to enable outside contributors to submit patches to us via Upstream.

The user flow that is realized in Upstream at the moment is documented in the repository.

You can find the collected and organized feedback here: https://miro.com/app/board/uXjVOLebw7c=/

As a maintainer I only see patches from contributors after I add them as remotes. This requires the collaborators to contact me out of band and requires me to explicitly take an action. Similarly, as a contributor I have to contact the maintainer out-of-band and announce my patch
~~I often forget to run rad sync after running upstream patch create or upstream patch update.~~ → got fixed