Fix some tests and add a CI pipeline

Hello,

I wanted to take a look a the GdParser and maybe add some functionality but I noticed that the tests were not passing.

I've fixed some of them, assuming that you renamed a bunch of tokens and forgot to update the tests accordingly.

However, there are still two failed cases, that I'm not really sure how to approach. They seem to be about parser error recovery. Can you take a look please?

I've also added a CI pipeline so that in the future, we can see if a PR or a commit is breaking the build.