This adds the same hosting patterns from A2A and OpenAI to AGUI:
- MapAGUI(IHostedAgentBuilder) and MapAGUI(IHostedAgentBuilder, string? path)
- MapAGUI(string agentName) and MapAGUI(string agentName, string? path)
- MapAGUI(AIAgent) and MapAGUI(AIAgent, string? path)
- ValidateAgentName for URL-safe validation
- Updated namespace to Microsoft.AspNetCore.Builder
- Renamed class to MicrosoftAgentAIHostingAGUIEndpointRouteBuilderExtensions
- Added comprehensive unit tests
* Initial plan
* Infrastructure setup
* Plan for minimal client
* Plan update
* Basic agentic chat
* cleanup
* Cleanups
* More cleanups
* Cleanups
* More cleanups
* Test plan
* Sample
* Fix streaming and error handling
* Fix notifications
* Cleanups
* cleanup sample
* Additional tests
* Additional tests
* Run dotnet format
* Remove unnecessary files
* Mark packages as non packable
* Fix build
* Address feedback
* Fix build
* Fix remaining warnings
* Feedback
* Feedback and cleanup
* Cleanup
* Cleanups
* Cleanups
* Cleanups
* Retrieve existing messages from the store to send them along the way and update the sample client
* Run dotnet format
* Add ADR for AG-UI
* Switch to use the SG and use a convention for run ids
* Cleanup MapAGUI API
* Fix formatting
* Fix solution
* Fix solution
Javier Calvarro Nelson
