Create a kit in-game

Wear and carry what the kit should have and run /rk kit create <id>. The tier is created with your materials, enchantments per group (and per piece where they differ), dye, pieces you are not wearing disabled, your off-hand item and the rest of your inventory as items-extra. It is appended to tiers.yml without touching the rest and reloaded; then give it a name and colour.