Add serialization for type metadata and registry

[waynemwashuma]

Objective

Introduces serialization, deserialization, and validation support for reflection type metadata and the TypeRegistry.

Solution

Each supported TypeInfo subtype now defines its serialized representation and handles converting to and from that representation.

Changes Made

The following changes were introduced:

• Added serialize, deserialize, and validateSerial methods for all type info.
• Added TypeEntry dispatch logic for supported TypeInfo subtypes.
• Added TypeRegistry serialization, deserialization, and validation.
• Added support for deserializing into existing output instances.

Why This Approach

This solution was chosen because:

• The kind discriminator makes serialized type information straightforward to validate and reconstruct.
• Serialization remains colocated with each type metadata implementation.
• Output parameters allow existing instances to be reused during deserialization.
• Registry-level serialization makes complete reflection schemas portable and persistable.

Showcase

N/A

Migration Guide

No migration required.

Checklist

• I have updated the documentation accordingly.
• I have added tests to cover my changes.