Add Product Showcase demo agent demonstrating A2UI core capabilities#1

Draft

Copilot wants to merge 7 commits intomainfrom

copilot/test-core-capabilities

Commits on Jan 5, 2026

Initial plan
Copilot
committed
Add Product Showcase demo agent with comprehensive A2UI capabilities

Copilot
and
amicharnoff
committed
Add client configuration and documentation for Product Showcase demo

Copilot
and
amicharnoff
committed
Add comprehensive documentation for A2UI Product Showcase demo

Copilot
and
amicharnoff
committed
Add comprehensive testing checklist for Product Showcase demo

Copilot
and
amicharnoff
committed
Add final summary document for complete Product Showcase demo

Copilot
and
amicharnoff
committed
Update main README to highlight Product Showcase demo

Copilot
and
amicharnoff
committed