Added the new skill “Pierce”

A new skill "Pierce" has been added to the Wyvern Knight (mounted) and Long Arch weapons. Holders of this skill always attack with half the enemy's defenses. This effect overlaps with Luna.

This is a visualization of what used to work in a masked data. The benefit of becoming this class was seemingly unclear, especially since the function of the Wyvern Knight was not mentioned anywhere in the game. I hope that you are now able to consider the promotion more appropriately.

With this change to a skill, I have reworked the process so that what used to be determined directly by the class ID or item ID now works as a skill. So it can be attached to other people or weapons. (For now, I have no plans to increase the number of people who possess this skill.)

It now shows up as a skill, but cannot be disabled by Nihil. Pierce can only be disabled by Balmung (shield).