Believe it or not, thanks to ChatGPT-4, I was able to get the AI to write a basic plugin that enables GIPHY gifs to be searched for and added to your post.

Right now, during testing, this only works in the default template (Blue responsive). And it only works on the Quick Reply box (not when you "go advanced").

This "Search for GIFs" field is right below the quick reply form. Type a keyword in there to pull up a bunch of animated GIFs related to what you're interested in posting. Then click on the image you want to add to your post. That's all there is to it.