ServiceCatalog catalog type of API

With permissionClaims and API work we will need to have catalog type of API to be able to construct "offerings" into UI.

Something like:
```
kind: ServiceCatalog
name: mango
spec:
  resources
   - resource: database.mango.com
   - resource: backup.mango.com
   permissionClaims:
   - resources: configmaps
```

Which would be baseline for "UI to show what is available" 