Wanderin - Overhauling wandering trader & trader llama mecha

- fixed some errors for Mythic items check - added ability to disable any trade item separately in trader.yml as so .SpoilerTarget">Spoiler: trader.yml Code (Text): # list of trade that will be removed from trader # use all to disable all vanilla trades # a list of all valid trade items can be found on https://www.spigotmc.org/resources/88984/ blackListVanillaTrades: # - ALL - oak_sapling - pufferfish_bucket