External projects missing some information

Variables in external projects are missing their prototypes if they are `type/class/procedure`, which means they are harder (impossible?) to look up. I don't think there's any way to recover this information for existing `modules.json` files, but we should be able to add it to new ones without breaking things.

Other entities are missing `all_*` collections, although there are `pub_*` collections and (some?) private ones. I think these can be constructed from existing information.