Add language guide code to repository w/ tests #300
Description
Currently, it's possible for code that is in the language guides to be broken/out of date and go unnoticed.
In an ideal world, we'd have some sort of automated process that actually went through the guide and tried to perform all the setup as a new user (maybe AI can do this in the future), but for now, we can get most of the way there by:
- Having all the code listings inserted from files (via markdown includes)
- Add CI for building the examples for every language
This would do a lot to ensure that we can't add code to guides that doesn't work.
It would be ideal if we could also include chunks of files via markdown (maybe there's a mdbook plugin for that?), but even if we only include full file listings it's still beneficial.