Pass query alongside openMarkprompt

[michaelfester]

Is your feature request related to a problem? Please describe. Some users want to take a piece of text and pass it to the prompt and automatically have it pasted (e.g. handover from a search box).

Describe the solution you'd like The openMarkprompt and MarkpromptOptions should have a messages parameters that allows to immediately fill in a message list and execute the query when the prompt is opened.