refactor(武器系统): 优化武器升级计算和描述显示

修改武器升级计算公式，将指数运算改为线性运算以提高性能
在武器描述中显示当前值和升级后的值
调整costBeachball的默认值从500改为100

scripts/Contents/Weapons/BigLaser.gd

@@ -4,7 +4,7 @@ class_name BigLaserWeapon
 
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 5 * to * soulLevel
-	origin["time"] /= 1.05 ** soulLevel * to
+	origin["time"] /= 1 + 0.05 * to * soulLevel
 	return origin
 func attack(entity: EntityBase):
 	var weaponPos = entity.findWeaponAnchor("normal")

scripts/Contents/Weapons/LGBTWeapon.gd

@@ -7,7 +7,7 @@ func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["count"] += to * soulLevel
 	origin["power"] += 0.05 * to * soulLevel
 	origin["trace"] += 0.25 * to * soulLevel
-	origin["angle"] /= 1.05 ** soulLevel * to
+	origin["angle"] /= 1 + 0.05 * to * soulLevel
 	return origin
 func attack(entity: EntityBase):
 	var weaponPos = entity.findWeaponAnchor("normal")

scripts/Contents/Weapons/VectorStarWeapon.gd

@@ -4,8 +4,8 @@ class_name VectorStarWeapon
 
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 5 * to * soulLevel
-	origin["forwardtime"] /= 1.05 ** soulLevel * to
-	origin["maxcount"] += 1 * level * soulLevel
+	origin["forwardtime"] /= 1 + 0.05 * to * soulLevel
+	origin["maxcount"] += 1 * to * soulLevel
 	return origin
 func attack(entity: EntityBase):
 	var weaponPos = entity.findWeaponAnchor("normal")