index - Index of a pet action button (between 1 and NUM_PET_ACTION_SLOTS) (number)
Returns:
start - The value of GetTime() at the moment the cooldown began, or 0 if the action is ready (number)
duration - The length of the cooldown, or 0 if the action is ready (number)
enable - 1 if a Cooldown UI element should be used to display the cooldown, otherwise 0. (Does not always correlate with whether the action is ready.) (number)
