Prerequisites: #10

Currently (v0.2.0), the release process explains that the source archive that is submitted to CRAN has to be built locally. This is a pain and error prone. So this should be automated instead
We could

• create a GH worfkow triggered on tag creation (see also [INFRA] Automate tag and files update #47) and workflow_dispatch (for manual rerun on issue)
• or reuse the existing "build" workflow and allow to run it with workflow_dispatch (for manual run)

Tasks

• Allow to run the existing build worfklow on workflow_dispatch and when a new tag is published
• Update the release procedure to use the workflow instead of building locally