Addons are building add-ons. Such as the elder aspect stones.
addon_motion_name: The motion associated with this addon being added.
modifiers: any modifier that this addon adds.
requirements: the requirement table necessary for this addon
time_cost: the cost and time table that determine this addons cost and time to build.
ui_hotkey_name: The hotkey name associated with the ability.
ui_index_hint: hint at where you want the ability to go in the bottom row, if this spot is already occupied, the ability will find the next location to be placed
