POC: embedding compiler state for `regal lint` command

[Anders Eknert]

And possibly other use cases. The issue this would address is the ~100 ms compilation time the bundle currently requires, and which is needed for all invocations of regal lint. The LSP doesn't suffer from this as it is a continuous process and one where prepared queries will make sure that compilation state is preserved between invocations.

@srenatus suggested taking a look at gob, and pointed to guide on that topic.

We should look into:

1. If this works
2. If it saves enough time to justify the added complexity
3. Decide on whether to do this based on that