Set up CI validation and workflows

[Arlodotexe]

Background

This repository is still pretty barebones, and is only recently picking up in terms of what can be done for work.
 

Problem

We're missing basic build validation. We don't need release pipelines, but we do need build validation to make sure PRs don't break unexpectedly.

Solution

We can grab the build validation yml from OwlCore.Template and use that, tweaking to our needs.

Make sure it's placed in the correct folder to be picked up for CI.