dotnet-1.8.0

What's Changed

• [C#] feat: O1 model support by @singhk97 in #2111
• [C#] fix: When streaming operation failed the exception is suppressed. by @singhk97 in #2122
• [C#] fix: content safety public preview deprecation by @singhk97 in #2138
• [C#] feat: Generated by AI Label, Feedback Loop, Streaming Buffer, Error Propagation, Entities Metadata by @lilyydu in #2139
• [C#] feat: Streaming - Citations & Sensitivity Label by @lilyydu in https://github.com/microsoft/teams-ai/pull/2147ai/pull/2150
• [C#] bump: dotnet to 1.8.0 by @singhk97 in #2157