Modding Help adding reload keybind and active item ability for it?

is there a way to add a reload key to starbound and the options menu and then create a 3rd active item ability slot that uses it for a mod resource called GunsNAmmo?

the mod comes with a active item ability for guns that reload/recock but i would like to change this so that it uses a new keybing "r" for reload for both 1 handed and 2 handed weapons