05/06 (Sat) Update - Challenge mode "Ruins" map added and extra soldiers added

○Added Claire Skin -Claire Skin "Office Costume" added ○Added Challenge Mode Map -Added Challenge Mode Map "Ruins" ○Added Extra Soldier -Mummy Soldier = Has high defense and HP, but only receives 50% healing. -Ruins Guardian = A powerful guardian that fires laser attacks in a straight line. ○Added Artifacts -Shockwave Armor = Sacrifices % of an ally's HP to decrease the HP of an attacking enemy by %. - Relic of Life = The HP of soldiers who wear it is shared. ○Added Skills -Attraction = Right-clicking while healing consumes magic power to attract allied soldiers. -Healing Wave = If there are nearby allies whose HP has been decreased, Automatically consume a lot of MP to heal them. ○Added Functions -Added Claire skill selection system -Added a function to cancel summoning soldiers (only summon points are returned / artifacts are unequipped) -Added extra soldier selection system -Added Artifact Unequipping System