[support-infra] Create GitHub action to force issues & PRs labeling

[oliviertassinari]

Steps to reproduce

Having all issues & PRs with a clear scope label feels critical to be able to properly work as a team of product engineers.

How do we know if it's correctly labeled?

• Issue scope: based on the database where we have product maintainers
• Issue type: bug, new feature, enhancement

Examples of annoyance:

• https://groups.google.com/a/mui.com/g/toolpad/c/yVpoXbFiKZA/m/qVFfWh9eAgAJ

How to implement it?

• PRs. We could have a GitHub Action that fails the PR if:

1. No “product scope” label is applied. B1. Add product scope on GitHub pull requests is meant to help prefill these labels but when merging the PR, the label should be present.
2. No “type” label is applied. See Pull request types 🐔. So one of “new feature”, “enhancement”, “bug”

• Issues. What if we had a GitHub action that would:

• Reapply the "status: waiting for maintainer" label if removed without proper other labels

• Reopen issues when closed if they are closed without proper other labels

Monitor

To monitor the effectiveness of the policy, we could update GitHub PRs/issues without labels 📊 to not only cover when there are no labels, but also when there aren’t enough.