fix(武器): 调整武器数值和配置

- 将多个武器的升级时间系数从0.05降低到0.02
- 为VectorStar、MushroomPickaxe和PurpleCrystal添加或调整costBeachball值
- 修改MushroomPickaxe的needEnergy从1.0增加到2.0
- 更新紫水晶簇的伤害显示和价格

scripts/Contents/Weapons/VectorStarWeapon.gd

@@ -4,7 +4,7 @@ class_name VectorStarWeapon
 
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 5 * to * soulLevel
-	origin["forwardtime"] /= 1 + 0.05 * to * soulLevel
+	origin["forwardtime"] /= 1 + 0.02 * to * soulLevel
 	origin["mincount"] += 0.5 * to * soulLevel
 	origin["maxcount"] += 1.5 * to * soulLevel
 	return origin