Extend TemplateType enum with TEMPLATE, SKILL, ACTOR, MCP, LSP.
Add optional package_ref field to ComponentReference for registry references.
Create ReferenceResolver with multi-server RegistryClient pool and caching.
Update InstantiationContext for registry-aware resolution with _original_reference.
Extend TemplateRegistry, EnhancedTemplateRegistry, and TemplateStore for 8 types.
Add registry reference detection in instantiate_from_config.
Add GenericTemplate for new package types without specialized template classes.
ISSUES CLOSED: #27
CoreRasurae
