Set up automated build process and publish releases

[thekid]

Add GitHub pipelines to do create .exe files and publish them for download under "Releases" as soon as a tag of the form v*.*.* is pushed.

https://github.com/marketplace/actions/gh-release looks like a good fit, an alternative would be to simply use the gh tool directly using YAML:

run: |
  gh release create ${{ env.VERSION }} -n "${{ env.MESSAGE }}" -t "${{ env.NAME }}" ${{ env.FILES }}
env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  VERSION: "tag for release"
  MESSAGE: "message for release"
  NAME: "release name"
  FILES: path/to/file1 path/to/file2 ...

(Source: softprops/action-gh-release#107 (comment))