How to add custom tool for turtle? For example: custom pickaxe, via kubeJS or custom mod, can u give me example or something like that pls

As a example you can look at netherite tools datapack, which adds enchantable turtle upgrades for all netherite tools. It should display example how to make datapack that adds your specific tools to CC:T and how to enable custom "allow enchanted" and "consume durability" modes if you want that.

Kinda related: #1600