id : id identify the semantic of a xml file, it tells bannerlord which type of data this xml file contains
path : file path of the xml without ".xml" suffix, relative to "ModuleData" folder of your mod
This mod is a technique demo. It just add a menu item "hello", and when you click it, the screen displays "hello, world".
So it's not interesting for normal players, but guys hacking bannerlord may find it useful.
source code: https://github.com/hejile/mb2_demo_mods