Request: Add abort method on chat completion stream

[Deepakanandrao]

It would be nice to have a stream.abort() method for the chat completion API.

e.g.

start(){
  this.stream = await this.mistralClient.chat.stream({
    model: 'mistral-small-latest',
    messages: [
      {
        content: this.prompt,
        role: 'user',
      },
    ],
  });

  for await (const chunk of this.stream) {
    const streamText = chunk.data.choices[0].delta.content;
    this.response += streamText; 
  }
}


// Stops the stream manually when called
stop() {
  
  if (this.stream) {
    this.stream.abort();
  }
}