New action for custom item

[Merkyrrie]

I am trying to create a custom item similar to the sewing kit that works on armor instead, and while I'm pretty certain on how to make it repair armor I'm not so sure how to go about adding the action to let it do so. I've done a new action before (with a lot of help, and less me doing my own work) but I don't know if in this instance, or every future instance for that matter, I should be doing it like I did before with an AddComponentAction in modmain or whether I should be trying to make a new component similar to the Sewing component to add to the custom item instead.

For either case, I could also use a little help on how to make a custom action out of that that would let me use the item on armor in my inventory

Thanks in advance!