separate out interfaces/types from proto objects

currently the proto files get generated with types baked in them, however, for modularity, it may make more sense to define them in separate files.

This can allow us to include more optionality, modularity when creating new plugins that depend on these types. Instead of building monolithic bundles, we can ask users to supply the path to the types and it can either be an existing npm package or in the same codebase.