Add build test

[codefromthecrypt]

I'm trying to figure out what signatures the current source build as, and there are some dependencies to get this to build which are also in flux. One thing that could make things more easy is to add a github workflow that not just parses the files, but actually constructs wasm out of it. Personally, I want to understand some API impact with less guessing about what the signatures will end up as. It is important to be able to do this without a lot of thinking or cognitive load, and one way to minimize that is to look at a GH workflow that can successfully compile this to wasm and just copy/pasta that.