* Upgrade to .NET 10
- Require .NET 10 SDK
- Include net10.0 assets in all assemblies
- Move net9.0-only targets to net10.0
- Update LangVersion to latest
- Remove complicated distinctions between debug target TFMs and release target TFMs
- Remove unnecessary package dependencies when built into netcoreapp
- Clean up some ifdefs
- Clean up some analyzer warnings
* Fix CI
* Add support for getting and creating Assistant and Foundry agents with ChatClientAgentOptions
* Fix options cloning and agent creation
* Fix inconsistency
* Add support for mapping more tools and integration tests for ensuring CreateAIAgent works with those tools.
* Add support for additional openai tools with tests.
* Remove special casing for function tools, since it's either not supported yet, or requires a lot of code duplication.
* Removed unused using.
* Fix broken unit tests
* Change integration test to reduce flakiness.
* Add ChatClientAgent constructor overload
* Add unit tests for new constructor
* Up code coverage with extra tests
* Address PR comments.
* Address PR comment
* Add additional test to increase code coverage.