Consider migrating to GitHub Actions

[manuelroemer]

New Feature Proposal

Description

I think that it might be a good idea to move from Azure Pipelines to GitHub Actions in order to have everything in one location. While there's no other benefit, I think that not having to switch pages is always nice. And so far, the two services seem to have feature parity for everything that this project needs.

Discussion

If this is done, the following steps might also be a good idea:

• [ ] Rename master to release in order to match my other/future repositories.
• [ ] Before swapping, check if GitHub Actions supports testing/building UWP projects (i.e. whether it has the correct Windows SDK).