External projects missing some information

[ZedThree]

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.