SemanticKernelAgent Support More Messages

@AutoGen.SemanticKernel.SemanticKernelAgent only supports the original ChatMessageContent type via IMessage<ChatMessageContent>. To support more AutoGen built-in message types like @AutoGen.Core.TextMessage, @AutoGen.Core.ImageMessage, @AutoGen.Core.MultiModalMessage, you can register the agent with @AutoGen.SemanticKernel.SemanticKernelChatMessageContentConnector. The @AutoGen.SemanticKernel.SemanticKernelChatMessageContentConnector will convert the message from AutoGen built-in message types to ChatMessageContent and vice versa.

[!NOTE] At the current stage, @AutoGen.SemanticKernel.SemanticKernelChatMessageContentConnector only supports conversation for the followng built-in @AutoGen.Core.IMessage

• @AutoGen.Core.TextMessage
• @AutoGen.Core.ImageMessage
• @AutoGen.Core.MultiModalMessage

Function call message type like @AutoGen.Core.ToolCallMessage and @AutoGen.Core.ToolCallResultMessage are not supported yet.

[!code-csharp]