Allow users to create and insert images into the play screen

This is something AI Dungeon does where you can click a "See" button and type a description of what your character sees and then the AI generates an image of that and inserts it into the narrative.

Along with this, allow players to insert their own images.

Here's an example from one of my AI Dungeon games:

https://play.aidungeon.com/adventure/w_bvT8WMyMqX/cthulhu-mythos-winton-johnston