Add a new GitHub Action to auto-assign PR reviewers

[na--]

This should hopefully automatically assign reviewers when a PR is opened, though it will probably only work when we merge it in master...

[na--]

Or not 🎉 worked even from the branch, though I guess I need to adjust numberOfReviewers to 1 😅

[inancgumus]

I believe we better add a skip option to prevent assigning WIP PRs:

# A list of keywords to be skipped the process that add reviewers if pull requests include it
skipKeywords:
    - wip

[inancgumus]

Does Github automatically assign reviewers? 🤔

https://docs.github.com/en/organizations/organizing-members-into-teams/managing-code-review-assignment-for-your-team#routing-algorithms

[inancgumus]

I requested a feature :)

kentaro-m/auto-assign-action#57

[na--]

@inancgumus, I think this only means that GitHub will automatically assign reviewers for PRs that originate from the team to other members of the team:

This will automatically route this team's code review requests to individual team members.

Which is not a problem for us, since we can already manually assign appropriate people to PRs when we open them. We mostly need this for external PRs

[codebien]

Should we use addAssignees: author?

[codebien]

Do we have Draft PR for that, or not?

[na--]

Should we use addAssignees: author?

I don't think this would add anything, the author of a PR is the one that works on it by default

Do we have Draft PR for that, or not?

We do, but not everyone always remembers to use it, so checking for WIP is probably a nice idea. And draft PRs are why this gets executed on the ready_for_review event as well.

[imiric]

It's not very clear from the documentation, but I guess this will pick 1 reviewer from each group at random?

Sounds good 👍