Enable register-docs by default #1389
Description
For UX reasons, it would be nice to have register-docs default-on. Quite a few people have already wondered why their RustDoc comments aren't shown in the editor.
We could disable the registration of docs at runtime if Godot runs in release/exported mode.
This would come at the cost of the (lightweight) markdown + unicode-id dependencies, which I think is acceptable.
In theory we can still keep the feature and let people opt out of it, however right now we have a setup that mandates several private features like __codegen-full to be provided. Maybe there's another way to set this up for CI and check.sh, e.g. through a command-line cfg.