Code & Test Create (empty) HolonDescriptor fn

[evomimic]

As a HI Developer... I have a working API that allows me to create a new (empty) HolonTypeDescriptor.

Per the Metaspace Design Spec this capability requires implementing the following functions from the DescriptorBuilder trait:

• [ ] create(type): TypeDescriptorBuilder -- a factory method that creates a new TypeDescriptorBuilder of a specified type
• [ ] createHolonDescriptor: HolonTypeDescriptorBuilder -- to specifically create a HolonDescriptorBuilder
• [ ] build -- to convert the Builder object to a HolonTypeDescriptor and store it as an entry in the Metaspace DHT.

NOTE: For this story... the HolonTypeDescriptor will have populated TypeHeader attributes (uuid, type_name, description, semantic_type, version, created_at, is_dependent) but not any properties, actions or relationships.

[evomimic]

Closing this issue as it is outdated. Will re-open a new issue that clarifies the exact work that needs to be done here.