New insert menu, drag/drop auto stacking, Ant Table component

<!channel> Hey folks! We just released a shiny new insertion menu, built to be friendlier and easier-to-navigate. :sparkles:

And:

• Drag/drop now implicitly creates stacks
• Added the new Ant Table component
More details here - reload Plasmic Studio to play with this, and shout with your thoughts! https://plasmic.substack.com/p/new-insert-panel-simpler-dragdrop