Do what @anon34495435 said.
The holograms are normal ArmorStands to avoid manual packet sending and to avoid breaking the plugin when the Minecraft version(and packets) change. Because of that the config file is not really needed. The only purpose is to enter longer texts(more than 100 characters, the chat doesn’t allow more). I’m waiting for the release of ChatUi Chat UI - A UI toolkit for the vanilla chat box to use the text editor.