Port the Angular restaurant sample to v0.9

[gspencergoog]

Description

This pull request ports the restaurant sample application to the v0.9 version of the A2UI framework. The changes involve updating the Angular client to use the new renderer service, adjusting the agent's prompt instructions to ensure compliance with v0.9 message formats, and refining the core data handling logic to support the updated architecture. These updates ensure the sample remains functional and consistent with the latest framework standards.

Highlights

• v0.9 Porting: Updated the restaurant sample to align with the v0.9 architecture, including updates to component rendering, data handling, and client-side communication.
• Component Host Enhancements: Improved the ComponentHostComponent to support dynamic component loading, flex styling, and asynchronous component initialization.
• Agent Prompting: Updated the agent prompt builder with mandatory instructions for v0.9 compliance, ensuring correct message sequencing and data structure formats.
• Data Handling: Refined DataContext and DataModel to better handle path resolution and added logging for easier debugging.