feat: Create and upload installer release via GA

[darcywong00]

Fixes #33

This expands the msbuild.yml GA to have a second "installer" job which compiles the installer and uploads the artifact to a created release tag. See https://github.com/sillsdev/SpeechAnalyzer/releases/tag/v3.1.1.2-alpha

Also tweaked the msbuild workflow to run on pull requests and published releases (instead of every push).

When merged, we'll be able to do these steps to make a release:

• Create release tag (has to be published, not just "draft")
• This GA will trigger a release build, then compile the installer, and upload the installer to the created release tag