added mention support in stream_message()#11

Abigayle-Mercer wants to merge 4 commits intojupyter-ai-contrib:mainjupyter-ai-contrib/jupyter-ai-persona-manager:mainfrom

Abigayle-Mercer:streaming-mentionsAbigayle-Mercer/jupyter-ai-persona-manager:streaming-mentionsCopy head branch name to clipboard