Forgive the TL;DR; - the examples on the site don't include any image inserting. How would I go about adding image insertion capability? Would the idea be that I build/find an image handler plugin module and add it in?
We realize and apologies for the lack of documentation for modules. One reason is the module interface is not finalized because we're not sure what the community will dream up and wanted to get feedback before making a decision that might unintentionally exclude certain use cases or encourage unsustainable designs. Depending on what's decided we will probably add functionality to the existing image tooltip. We'd love for you to be involved in the discussion if this is an area of interest.