Updates Merchant Prince

[Kelprunner]

About The Pull Request

Basically the title. Reworks the Merchant Prince to actually be merged with the Appraiser. New description, cleaned up their skills, unfucked their magic so they can actually use/learn from scrolls.

Why It's Good For The Game

Basically this is one giant bugfix. Current MP is objectively useless and actually trying to play one, without infringing on another existing job, is closer to grief than just playing a weird mage as them. Also, hopefully, the rework makes them more appealing so some form of guild leadership is semi-constant as they're now - implicitly - the boss of the Adventurer's Guild so long as money is involved. Which is, like, all the time for those murderhobos.

Changelog

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• Removed all the excess combat skills
• Removed repeating skills
• Added learnmagic trait so they can actually use scrolls / learn spells
• Added the Appraiser's keys to their inventory so they can actually replace the Appraiser
• Reworked their statblock so it's slightly less abuseable (the +4 to PER was actually kind of disgusting?)
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