Create an addon

• First, use this template: https://github.com/CodeDoctorDE/ItemMods-Addon. You can find a button "Use this template" to create your repository from this template.
• Clone this repository to your computer with the git clone command.
• ...
• Upload that on https://spigotmc.org. I will help you if you have problems or you want to link it on the main page of ItemMods.