* workflow runs on a tag of the form v*.*.* e.g. v1.2.3
* workflow consists of two jobs: package then release

package:

* run the dotnet build process using a matrix strategy
* generate and zip output
* upload zip as GitHub Actions artifact

release:

* blocked until package finishes successfully
* download all GitHub Actions artifacts (from all matrix builds)
* make new GitHub Release, attaching all artifacts

refactor path into a reusable step output

distinct from the app version and the OS runtime