Problems when using toolcalls in streaming

[yp05327]

1. The return of acc.JustFinishedToolCall() - FinishedChatCompletionToolCall does not contain toolCallID, which is is required for openai.ToolMessage, so users need to record it by themselves.
2. We should append the origin tool call Message to the message list used in the API call.
   For non-streaming, you can simply append chat.choices[0].message like:
   https://github.com/openai/openai-[go/blob/952d231c9d5fce675262a6a639a99a62249d4a7f/examples/chat-completion-tool-calling/main.go#L62](https://www.golinks.io/blob/952d231c9d5fce675262a6a639a99a62249d4a7f/examples/chat-completion-tool-calling/main.go#L62?trackSource=github)
   For streaming, it seems that there's not implements about it, maybe something like openai.ToolCallsMessage? Or, simply use FinishedChatCompletionToolCall as the Message?
   Also, I could not find any examples about it. I only found this:
   https://github.com/openai/openai-[go/blob/952d231c9d5fce675262a6a639a99a62249d4a7f/examples/chat-completion-accumulating/main.go#L65-L68](https://www.golinks.io/blob/952d231c9d5fce675262a6a639a99a62249d4a7f/examples/chat-completion-accumulating/main.go#L65-L68?trackSource=github)
   If you don't append the origin tool call Message with only one openai.ToolMessage, you will get this error:

Invalid parameter: messages with role 'tool' must be a response to a preceeding message with 'tool_calls'.