Bump jupyter chat 0.24

[brichet]

This PR bumps @jupyter/chat to 0.24

[brichet]

Currently the persona is not compatible with jupyter-ai because the persona can't propagate message in a chat from jupyterlab-chat (see jupyterlab/jupyter-chat#454).

Commented by @brichet in #356 (comment)

While jupyterlab/jupyter-chat#455 has been merged, this is not enough to make the persona extension compatible with jupyter-ai, because we still need the message ID when a bot message has been sent. It would allow replacing the following addMessage with sendmessage, and store the streaming message.

ai/packages/persona/src/persona.ts

Lines 372 to 374 in 46bae59

	this._model.messageAdded(message);
	this._streamingMessage =
	this._model.messages.find(m => m.id === event.data.messageId) ?? null;

jupyterlab/jupyter-chat#477 should help with it, by return the message ID when a message is sent.

[jtpio]

Thanks!

Some commented code could likely be removed, otherwise looks good to go.

[brichet]

Thanks for the review @jtpio