Add 2nd class and lower skills to reproduce option on Copy Cat NPC

Imported from legacy Flarum.
Original author: joy (Flarum #816)

as the name suggest, bcs its not always 3rd class skills to copy with reproduce

Imported from legacy Flarum.
Original author: ChubbyMouse (Flarum #862)

also not all skills are included, sadly… many skills are copyable but not available in npc like heal, sanctuary and etc