Resolving kind of feature

As a developer, the endpoint payload is enhanced with the kind of features in the outbound/inbound obj.

We identified 3 kinds of vertex:

• project: a feature declared in the current Project, either from a template or manually created.
• missing: a feature that is referenced, but doesn't exist
• registry: a feature declared in a registry (either from a Target platform or a package)

Resulting payload is:

{
  featureType: String,
  featureId: String,
  outbounds: [
     {
        featureType: String,
        featureId: String,
        kind: <project|missing|registry>,
     }, ...
  inbounds: [
     {
        featureType: String,
        featureId: String,
        kind: <project|missing|registry>
     }, ...
  ]
}