Improve error granularity when creating resources

[britzl]

When working with Live Update it would be really helpful if resource errors has a higher granularity. As it is now, any failure to create a resource (resource.cpp > DoCreateResource) often result in the generic dmResource::RESULT_FORMAT_ERROR.

Take res_render_script.cpp as an example where ResRenderScriptCreate() will return RESULT_FORMAT_ERROR when it

• fails to load the protobuf file using dmDDF::LoadMessage
• fails to create submodules using dmGameObject::RegisterSubModules
• fails to create the render script using dmRender::NewRenderScript

(the same kind of scenario exists for res_script.cpp as well).

It would be very helpful if I as a developer knew if it was breaking change in the protobuf format (unlikely) or if my liveupdate archive has a reference to a file that doesn't exist (more likely).