Template:XC1 PC art data

Incomplete; probably shouldn't use until it is. The following values are not added yet:
 * name
 * pc
 * cast
 * dmg_type
 * icon
 * icon_base
 * act_index
 * idx

Assumption: There are no arts where base power is equal but levelled power is unequal (rate1 == rate2 && grow_powl != grow_pow2).