Added support for multiverse inventories

[CuddleTheif]

Multiverse Inventories fights with this plugin when entering a dungeon world so I added a few lines that will give the player a temp transient permission that Multiverse uses when entering and exiting dungeons so their inventories don't get affected by it. Have tested with LuckPerms and seems to work perfectly. Should give full remove any issues between Multiverse Inventories and Dungeons XL. (Though maybe mentioning in the wiki under compabilty that you must turn on said permission in the Multiverse Inventories config for this to do anything).