Add drawing support to mention

[jeffe]

Is your feature request related to a problem? Please describe.
At the current time mentions do not support drawing, instead you use dalle. However vision-preview drawing does significantly better at some tasks.

Describe the solution you'd like
Add support for drawing to the @ / Mention mechanism

Describe alternatives you've considered
Add a /draw that would go along with /dalle draw
One advantage this would have is if the system-setting global model isn't set to gpt-4-vision-preview, a /draw function could override this.

[Kav-K]

@jeffe I don't understand how mentions-based drawing would work, there is no contextual history when invoking the bot through mentions. We already support drawing with gpt-vision-preview within conversations with /gpt converse draw:True, have you tried that?