Release using GitHub Actions

[PeterOrneholm]

Is your feature request related to a problem? Please describe. Now that we are building using GitHub Actions we can also release the packages and samples using GitHub Actions.

Describe the solution you'd like

• [x] Release every package built from main to GitHub Packages for "nightly build" access
• [ ] After manual verification, allow for the package to be released to NuGet.org
• [ ] Release every build from main of the samples to Azure

Note: GitHub Actions now supports Environments and Manual Approval: https://cloudlumberjack.com/posts/github-actions-approvals/

Note: Don't forget to update the docs, including the URL for the package feed of our CI builds.