Tooling: add automated publishing workflow

[Uninen]

No description provided.

[suterma]

Since this is an open source project, you might be eligible for a free Microsoft Azure Build Agent. If you are into Microsoft. I am currently using this, and it works very well. I blogged about it here: https://qrys.ch/how-to-build-and-deploy-a-vue3-app-from-a-github-repo-to-a-domain-using-azure-pipelines/

[Uninen]

This is easy enough to do with a very simple GitHub Actions workflow which runs either on a merge or a tag etc. no need for any third party 👍