game: add weapon base and sword

global_const.gd

@@ -18,6 +18,7 @@ const GROUP_DAMAGEABLE = "damagable"
 const GROUP_PLAYER = "player"
 const GROUP_XP_ORB = "xp_orb"
 const GROUP_PICKUP = "pickup"
+const GROUP_PROJ_MANAGER = "proj_manager"
 
 enum ModRarity { LEGENDARY, EPIC, RARE, NORMAL }