feat: github actions releases and publishing

[leocov-dev]

new workflows to support creating GitHub releases and publishing wheels to PyPi

• draft-release.yaml
  • when a tag is pushed matching ..* this workflow will trigger
  • it will build the wheel and source distributions and upload them to a new draft GitHub release
  • it will create some descriptions in the release text with recent changes
• publish.yaml
  • when a release is moved from draft to published in the GitHub UI this workflow will trigger
  • it will download the files (wheel, sdist) from the release that was just published and upload them to PyPi

i added some status badges to the readme