[dev]: add aur job to publish.yaml

[jsjoeio]

Problem

After we publish a release, we have to manually go to the code-server-aur repo and publish a new version of the package. This should be automated as part of the release process.

Solution

Add a job called aur to publish.yaml that waits on npm and then publish new AUR package with script.

Notes

• this may not be straightforward. we'll need to add a CI account or something to the AUR package as a maintainer
• it could make sense for the job here to open a PR then have a separate GH Actions workflow in the actual repo that publishes the package on merge into default branch
• this could help: https://github.com/ouuan/AUR-template

Related

• Update AUR package to 3.9.1 #2802

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no activity occurs in the next 5 days.

[jsjoeio]

Still planning to do this

[jsjoeio]

I am hoping to work on this soon.

[jsjoeio]

We could also create a PR into the code-server AUR repo and then publish to AUR on merge.

[jsjoeio]

Closing in favor of #5366 and coder/code-server-aur#13