Initial proof of concept changes to Fabric Minecraft example mod. Generate 1 random ChatGPT prompt, display it above all Living Entities.

Now uses split-sourceset's

* Update build script to support Gradle 9

* Another fix

* Fix

Also updates fabric loader.

The [old page](https://fabricmc.net/versions.html) is missing links to the online javadocs. It tells users to use the [new page](https://fabricmc.net/develop) instead, so we might as well provide the new one here to begin with.

Using JAVA_17 is currently broken with the production server and not necessarily indicated by how Mixin treats this field