Add recipes and github action to test autopkg release nupkg

[jgstew]

Add AutoPkg Recipes:

• AutoPkg-Release-Source.download.recipe.yaml
  • Downloads the newest released source.zip
  • originally here: https://github.com/jgstew/jgstew-recipes/blob/main/AutoPkgRecipe/AutoPkgRelease.download.recipe.yaml
• AutoPkg-Release-Source.nupkg.recipe.yaml
  • creates nupkg from newest released source.zip
  • originally here: https://github.com/jgstew/jgstew-recipes/blob/main/AutoPkgRecipe/AutoPkgRelease.nupkg.recipe.yaml
• AutopkgCoreProcessors.test.recipe.yaml
  • tests many cross platform autopkg core processors
  • originally here: https://github.com/jgstew/jgstew-recipes/blob/main/Test-Recipes/AutopkgCore.test.recipe.yaml

Add GitHub Action:

• .github/workflows/AutoPkgReleaseNupkg.yaml
  • Automatically tests the above recipes. Tests that AutoPkg is working by running the test recipe.
  • This workflow is designed to be used to automatically create a nupkg file on AutoPkg release. I use a similar method to build wheel files for python projects and attach the wheel file to the release automatically.
  • originally here: https://github.com/jgstew/jgstew-recipes/blob/main/.github/workflows/AutoPkgReleaseNupkg.yaml